CN212577049U - Polyurethane foaming equipment capable of adding powder components and pouring in multiple flow passages - Google Patents

Abstract

The utility model discloses a polyurethane foaming equipment of pouring of powder component multithread way can add, including the rifle head body, set up A component injection device, B component injection device on the rifle head body, rifle head body inside set up with A component injection device, B component injection device assorted little piston, mixing chamber, be used for injecting into the C component injection device of powder component and B material premix, set up the C component runner with C component injection device assorted on the little piston, C component runner communicates to the mixing chamber; when the small piston is positioned at a working station, the component C runner is communicated with the component C injection device; when the small piston is at the stop station, the C component flow passage is not communicated with the C component injection device. The utility model discloses the site pouring foaming operation for solving polyurethane railway roadbed piece among the prior art receives weather, environmental impact great, can't be under the humid environment operation, need the problem of predrying, realizes adding the C material and reduces the requirement to the operation environment, improves the purpose of operating efficiency.

Description

Polyurethane foaming equipment capable of adding powder components and pouring in multiple flow passages

Technical Field

The utility model relates to a polyurethane roadbed field, concretely relates to polyurethane foaming equipment of pouring of additive powder component multithread way.

Background

The ballast bed is an important component of the track and is the foundation of the track frame. The sleeper-supporting device comprises a sleeper and ballast stones, and is mainly used for supporting the sleeper, uniformly transmitting the huge pressure on the upper part of the sleeper to a roadbed, fixing the position of the sleeper, preventing the sleeper from longitudinally or transversely moving, greatly reducing the deformation of a roadbed, simultaneously relaxing the impact of a locomotive wheel on a steel rail, and facilitating drainage.

The traditional track bed is divided into a common ballast track bed, an asphalt track bed and a concrete integral track bed. The conventional ballast bed is usually formed by piling hard crushed stones with certain particle size, grading and strength, and graded pebbles or coarse sand can be used on a secondary line. The asphalt track bed is a structural form added with emulsified asphalt or asphalt mortar for improving the dispersion characteristics of the common stone ballast track bed. The whole ballast bed is usually of a cast-in-place reinforced concrete structure and is usually used in a tunnel or on a bridge which is not easy to deform.

In recent years, a polyurethane ballast bed block filled with polyurethane foam has appeared, and has excellent bearing and damping capabilities. The polyurethane curing ballast bed is a novel track structure between a ballast track and a ballastless track, and has good elasticity of the ballast track and stability and maintenance-free performance of the ballastless track structure. In the prior art, the polyurethane curing ballast bed is mainly cast-in-place polyurethane curing ballast bed. However, the cast-in-place curing mode has the following limitations: when the polyurethane is cured, the ballast is required to be clean and dry. Therefore, the cast-in-place polyurethane curing track bed not only puts severe requirements on various links of loading, unloading, storage, transportation, tamping and the like of the railway ballast, but also requires special equipment to be used for railway ballast drying operation before casting. On the one hand, extra investment and burden are added to construction operation, and the extra investment and burden become one of the reasons for the high construction cost of the polyurethane solidified ballast bed; meanwhile, the influence of weather and environmental temperature on site construction is large. In addition, in the prior art, polyurethane track bed pouring is performed by using a gun head corresponding to a pouring point, and for a sleeper, two sides need to be separately constructed, namely the gun head is aligned to one side of the sleeper for pouring, and the whole sleeper moves after pouring is completed, so that the gun head is aligned to the other side of the sleeper for pouring; the operation mode has low efficiency, and the pouring of one sleeper needs to be moved, positioned twice and operated twice.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a polyurethane foaming equipment of pouring of can adding powder component multithread way to the problem that the site pouring foaming operating efficiency is low of polyurethane railway roadbed piece among the solution prior art realizes that the pouring of double-flow-passage is simultaneously poured, the railway roadbed is exempted from to dry, can accomplish the pouring operation of a sleeper once, makes efficiency double, improves the purpose of operating efficiency.

The utility model discloses a following technical scheme realizes:

the polyurethane foaming equipment capable of adding powder components and pouring in multiple flow passages comprises a gun head body, wherein an A component injection device and a B component injection device are arranged on the gun head body, a small piston and a mixing chamber which are matched with the A component injection device and the B component injection device are arranged in the gun head body, the polyurethane foaming equipment also comprises a C component injection device, a C component flow passage which is matched with the C component injection device is arranged on the small piston, the C component flow passage is communicated with the mixing chamber, and high-pressure collision mixing is carried out on the C component flow passage and A, B materials in the mixing chamber; when the small piston is positioned at a working station, the component C runner is communicated with the component C injection device; when the small piston is at the stop station, the C component flow passage is not communicated with the C component injection device.

To reduce the time required for casting cured polyurethane road blocks in situ and to increase the resistance to moisture, it is desirable to increase the moisture resistance of the blowing agent. In a traditional polyurethane foaming gun, a material A (namely a white material) and a material B (namely a black material) are simultaneously input into a gun head, so that the materials are subjected to foaming reaction through high-pressure hedging mixing, and a large piston and a small piston are arranged in the gun head, so that the control of each working condition is realized. If the moisture resistance is improved, a water repellent agent or a water repellent agent needs to be additionally added, however, the existing water repellent agent or water repellent agent is generally in a powder shape, and how to add the water repellent agent or water repellent agent into the raw materials of the polyurethane foaming agent is always a problem. It is a challenge to add the A, B material stably without affecting its inherent A, B material injection structure. For this purpose, the applicant proposes to premix the powdery water repellent agent or water repellent agent with the component B to form the component C, and then to add the components together. In this application, A component injection device, B component injection device all use prior art can, and this internal little piston of rifle head, hybrid chamber also are prior art, do not describe here any longer. This application sets up C component injection device on rifle head body for pour into the C component, C component injection device will pour into the C component into to rifle head body inside, therefore its output must insert to rifle head body internally. Preferably, can be trompil on rifle head body, make C component injection device's runner input just to this trompil, because C component contains solid particle, can not adopt the pressure regulating needle valve, the utility model discloses a long and thin hole with flow matching realizes mixing with the high-speed clash of A, B materials. In the prior art, for a polyurethane foaming gun, a small piston is provided with a working station and a stop station, when the polyurethane foaming gun needs to be poured and foamed, the small piston is positioned at the working station to open a mixing cavity, and at the moment, a black material and a white material are mixed in the mixing cavity at high pressure; when the pouring foaming is not needed, the small piston is retreated to the stopping station. On the basis of the prior art, the C component runner matched with the C component injection device is arranged on the small piston. The component C runner is inevitably moved along with the station switching of the small piston, and the requirements are specifically met: when the small piston is positioned at a working station, the component C runner is communicated with the component C injection device; when the small piston is at the stop station, the C component flow passage is not communicated with the C component injection device. That is, when the small piston is at the working position, the component C runner moves to be opposite to the component C injection device; when the small piston is at the stop station, the component C runner is staggered with the component C injection device. Through the application, can be so that keep current polyurethane foam gun basic structure, do not influence under the prerequisite that A material and B material high pressure were poured into, realize the stable synchronous interpolation of the C material of the in-situ casting in-process powder and B material premix, thereby absorb water and prevent damp through C material, so as to overcome among the prior art polyurethane roadbed piece the in-situ casting foaming operation receive weather, the environmental impact is great, can't be under the humid environment operation, the problem that needs the predrying, the realization need not to carry out the predrying, show reduction manpower and equipment demand, simplify the operation process, reduce the requirement to the operational environment, improve the mesh of site operation efficiency. The output end of the gun head body is connected with a splitter, and the splitter comprises two branches. In the prior art, polyurethane track bed blocks are poured by using a gun head corresponding to a pouring point, and for a sleeper, two sides need to be separately constructed, namely the gun head is firstly aligned to one side of the sleeper for pouring, and the whole sleeper is moved after pouring is finished, so that the gun head is aligned to the other side of the sleeper for pouring; the operation mode has low efficiency, and the pouring of one sleeper needs to be moved, positioned twice and operated twice. In this scheme, connect the shunt at the output of rifle head body, the shunt includes two forks, carries out the synchronous pouring to the sleeper both sides, only needs once pouring can accomplish the pouring operation of a sleeper to can show removal, the location number of times that reduces the on-the-spot foaming operation in-process, show and increase substantially the operating efficiency. Wherein, the interval between two forks, it can to satisfy two forks lie in the sleeper both sides respectively when the operation.

Furthermore, the device also comprises a metering cylinder and a storage tank which are sequentially connected with the C component injection device, and a stirring device is arranged on the storage tank. The storage tank is used for storing C component, and is different from the traditional mode of carrying the powder through the gear pump, and the powder passes through the measurement jar in this scheme and carries to C component injection device, and this measurement jar carries to the C component that contains the solid particle and stablizes not to block up, can show improvement transport accuracy, and measures the pay-off volume to the improvement adds the control accuracy of proportion to C component.

Preferably, the metering cylinder in the scheme is a single-plunger high-pressure metering cylinder and is divided into a material injection cylinder and a power cylinder. The storage tank supplies materials to the material injection cylinder, positive pressure can be added to the storage tank, the C component after premixing is prevented from being too high in viscosity and not being drawn out easily, and the metering cylinder is prevented from being sucked in an empty mode. The power cylinder provides power for the material injection cylinder and drives the material injection cylinder to act to output the premixed component C. The power source of the power cylinder can be any driving mode such as pneumatic, hydraulic or electric. The metering function of the metering cylinder in the scheme is realized by calculating the volume of the material injection cylinder and the frequency of the power cylinder.

Furthermore, the flow divider comprises a base body, a coating is coated on the inner wall of the base body or the base body adopts a polytetrafluoroethylene pipe lined inside, and a flow dividing flow regulating valve is arranged on each fork. The inner wall of the matrix is coated with a coating, so that the residue and adhesion of foaming materials on the inner wall of the flow divider are reduced. All set up reposition of redundant personnel flow control valve on every branch, be favorable to carrying out the independent control to the flow of different bifurcations to make this application satisfy in the use of more operating modes.

Further, the coating is one or more of a teflon coating, a nano non-stick coating and a metal non-stick coating.

Further, a positive pressure cleaning device is arranged on the gun head body and used for inputting positive pressure air into the gun head body; and each branch of the flow divider is provided with a negative pressure cleaning device, and the negative pressure cleaning devices are used for manufacturing negative pressure in the corresponding branches. In the prior art, for a polyurethane foaming gun, the interior of the polyurethane foaming gun realizes the cleaning of residual foaming materials through the action of a large piston, and the large piston cannot extend out of a gun head body; this inherent concept is also one of the main reasons that prior art foam guns are used to correspond to a pour point. Owing to increased the shunt in this scheme, big piston can't stretch out to the rifle head body outside and get into the shunt, therefore the remaining foaming material of shunt inner wall is difficult to by the clearance, very leads to very easily at shunt inner wall foaming solidification, leads to the shunt to block up, influences the normal operating of whole device. Therefore, the gun head body is provided with the positive pressure cleaning device, and each branch of the splitter is provided with the negative pressure cleaning device, after the pouring is finished, positive pressure air is immediately input into the gun head body through the positive pressure cleaning device to blow out most of residues, the residual raw materials have very strong adhesiveness, the positive pressure has very small blowing effect on the inner wall of the flow channel, the residues on the pipe wall cannot be thoroughly cleaned, after the positive pressure is finished and the positive pressure conveying is stopped, negative pressure is introduced to realize secondary cleaning of the residues on the pipe wall, the residues on the pipe wall can be thoroughly cleaned secondarily because the negative pressure has a very good tearing function, therefore, the foaming material remained on the inner wall of the shunt is quickly discharged from the end parts of all branches, the phenomenon that the foaming material is solidified and blocked in the shunt is avoided, and the problem that one foaming gun is difficult to construct at multiple points simultaneously in the prior art is solved.

Preferably, the negative pressure cleaning device in the application can use one-stage or multi-stage negative pressure cleaning; the negative pressure source includes, but is not limited to, any negative pressure device in the prior art, such as a vacuum generator, a vacuum pump, etc.

The mold release agent injection device is connected with the positive pressure cleaning device and used for injecting mold release agent into a flow divider connected with the positive pressure cleaning device. After negative pressure secondary thorough cleaning is finished, a certain dosage of release agent is injected through the release agent injection device, and the injected release agent can be attached to the inner wall of the shunt, so that the rapid cleaning of a foaming material after next pouring operation is facilitated, the residual quantity on the inner wall of the shunt is reduced, and the normal reuse of the shunt is ensured.

Preferably, the release agent injection device is connected with the positive pressure cleaning device through a three-way valve, namely three joints of the three-way valve are respectively connected with an input end of positive pressure air, the release agent injection device and the positive pressure cleaning device. Different inputs are realized by switching the stations of the three-way valve. Specifically, when positive pressure air is required to be input to clean the flow divider, the communication between the three-way valve and the release agent injection device is cut off; and when the release agent needs to be input, the communication between the three-way valve and the positive pressure cleaning device is cut off.

Preferably, the release agent injection device is a mixing tank of the release agent and positive pressure air.

Furthermore, the positive pressure cleaning device is positioned on the opposite side of the component C flow channel and comprises a sealing piston and an elastic part connected with the sealing piston; when no external force acts, the elastic piece enables the sealing piston to block the communication between the positive pressure cleaning device and the mixing cavity; when the positive pressure cleaning device pressurizes, the elastic piece deforms to drive the sealing piston to act, so that the positive pressure cleaning device is communicated with the mixing cavity. In getting into malleation belt cleaning device after avoiding all kinds of foaming agent to mix, this scheme sets up sealing piston and carries out automatic shutoff temporarily, and when need not using malleation belt cleaning device, the intercommunication department between malleation belt cleaning device and the hybrid chamber is all plugged up to sealing piston. The high-pressure impact mixing of each component in the mixing cavity is considered, the pressure is high, the sealing piston is pushed open in order to avoid the pressure, the elastic piece is further arranged, and when no external force action is guaranteed through the elastic force of the elastic piece, the sealing piston can always block the communication between the positive pressure cleaning device and the mixing cavity. The elastic element in this embodiment is preferably a spring in a deformed state, and its elastic restoring force always acts on the sealing piston. When the positive pressure cleaning device needs to be used, the positive pressure cleaning device is started, compressed air is supplied inwards, the elastic force of the elastic piece is overcome after the air pressure is increased, the elastic piece is further deformed, the sealing piston is driven to act, and the positive pressure cleaning device is communicated with the mixing cavity. According to the description in the present application, a person skilled in the art can set the connection structure and the position relationship between the elastic member and the sealing piston in any suitable manner, and any connection scheme that can satisfy the technical effect of the sealing piston falls within the scope of protection of the present application.

Further, the A component injection device and the B component injection device respectively comprise an input runner and an output runner, and the circulation mechanism is used for enabling the input runner of the A component injection device to be communicated with the output runner and the input runner of the B component injection device to be communicated with the output runner. For a traditional foaming gun, the injection structures of the component A and the component B are controlled to be opened and closed through valves, and the valves are opened when materials are required to be injected and closed when the materials are not injected; the structure needs to frequently open and close the valve in the field pouring process of the polyurethane track bed block, and the raw materials are suddenly static in non-working time, easily cause sedimentation and are not beneficial to keeping the uniformity of the raw material mixing. Therefore, in the scheme, the A component injection device and the B component injection device are respectively provided with the input runner and the output runner, when materials are not injected, the A component enters from the input runner on the A component injection device and then flows out from the output runner on the A component injection device through the circulating mechanism, and the B component is in the same way, so that the circulation of black materials and white materials is always kept in the whole operation process, the black materials and the white materials are always in a uniformly mixed state, and the foaming quality is improved obviously.

Furthermore, the circulating mechanism is two circulating grooves formed in the surface of the small piston;

when the small piston is positioned at the stop station, one circulation groove is communicated with an input flow channel and an output flow channel on the component A injection device, and the other circulation groove is communicated with an input flow channel and an output flow channel on the component B injection device;

when the small piston is at the working position, the circulating groove is not communicated with the corresponding input flow passage.

Namely, when the small piston switches the station, the two circulation grooves on the small piston are driven to move synchronously; when the small piston is positioned at a stop station, the circulation of the component A and the component B can be realized through the two circulation grooves; when the small piston is positioned at a working station, the normal mixing and material injection of the component A and the component B can not be influenced.

Further, the powder component is solid powder with extremely strong water absorption capacity.

Compared with the prior art, the utility model, following advantage and beneficial effect have:

1. the utility model discloses the shunt is connected to the polyurethane foaming equipment of the pouring of additive powder component multithread way, at the output of rifle head body, and the shunt includes two forks to can show removal, location, the number of times of opening and close that reduces the on-the-spot foaming operation in-process, once can accomplish the pouring operation of a sleeper, increase substantially the operating efficiency.

2. The utility model discloses the polyurethane foaming equipment of pouring of additive powder component multithread way, keep current polyurethane foaming rifle infrastructure unchangeable, do not influence under the prerequisite that A material and B material high pressure were poured into, the stable synchronous interpolation of C component after realizing in-situ pouring in-process to powder and B material premix, thereby it is dampproofing to absorb water through C component, the in-situ pouring foaming operation of polyurethane railway roadbed piece receives weather with this overcoming among the prior art, environmental impact is great, can't be under the humid environment operation, the problem that needs the predrying, the realization need not to carry out the predrying, show reduction manpower and equipment demand, simplify the operation process, reduce the requirement to the operation environment, improve the mesh of on-site operation efficiency and railway roadbed stability.

3. The utility model discloses polyurethane foaming equipment that can add powder component multithread way pouring, set up malleation belt cleaning device on rifle head body, all set up negative pressure belt cleaning device on every branch of shunt simultaneously, after the pouring is accomplished, immediately through malleation belt cleaning device to rifle head internal input malleation air, blow off most residues, because of remaining raw materials have very strong adhesion, the positive pressure is very little to the blast effect of pipeline inner wall, can't realize the thorough cleaning of pipe wall residue, after the malleation is accomplished to wash and stop malleation transport, the secondary cleaning of pipe wall residue is realized to the leading-in negative pressure, because of the negative pressure has fine tearing function to pipe wall residue, can realize secondary thorough cleaning, thereby discharge the foaming material that remains the shunt inner wall from each forked tip fast, avoided the phenomenon of foaming material solidification jam in shunt inside, thereby solving the problem that one foaming gun is difficult to carry out multi-point simultaneous construction in the prior art.

4. The utility model discloses the polyurethane foaming equipment of pouring of additive powder component multithread way, when not annotating the material, through circulation mechanism for the input runner that A component was followed on the A component injection device gets into, flows out from the output runner on the A component injection device again, and B component is the same reason, thereby at whole operation in-process, the circulation of keeping black material, white material throughout ensures that black material, white material are in the state of misce bene, has apparent effect to improving the foaming quality.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a sectional view of a gun head body according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of the flow path axis through component C in an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a flow divider according to an embodiment of the present invention.

Reference numbers and corresponding part names in the drawings:

the device comprises a 1-A component injection device, a 2-B component injection device, a 3-C component injection device, a 301-C component flow channel, a 4-positive pressure cleaning device, a 401-sealing piston, a 402-elastic part, a 5-flow divider, a 501-matrix, a 502-coating, a 6-flow dividing flow regulating valve, a 7-negative pressure cleaning device, an 8-metering cylinder, a 9-material storage tank, a 10-air pressure regulating valve, an 11-small piston, a 12-mixing cavity, a 13-circulation tank, a 101-input flow channel, a 102-output flow channel, a 14-demolding agent injection device and a 15-stirring device.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.

Example 1:

as shown in fig. 1 to 4, the polyurethane foaming device capable of adding powder components and pouring in multiple flow channels comprises a gun head body, wherein an a component injection device 1 and a B component injection device 2 are arranged on the gun head body, a small piston 11 and a mixing chamber 12 which are matched with the a component injection device 1 and the B component injection device 2 are arranged in the gun head body, the polyurethane foaming device further comprises a C component injection device 3, a C component flow channel 301 which is matched with the C component injection device 3 is arranged on the small piston 11, and the C component flow channel 301 is communicated with the mixing chamber 12; when the small piston 11 is at a working position, the C component runner 301 is communicated with the C component injection device 3; when the small piston 11 is in the stop position, the C component flow passage 301 is not communicated with the C component injection device 3. Wherein the component C is a powdery water absorbent or a premix of a waterproof agent and the material B. Preferably, in this embodiment, the lance tip body is provided with an opening, so that the output end of the C component injection device faces the opening. The component C flow path 301 is moved to be aligned with or displaced from the opening.

In this embodiment, a C component flow passage 301 matched with the C component injection device 3 is provided on the small piston based on the prior art. The component C runner 301 inevitably moves along with the station switching of the small piston, and specifically needs to satisfy: when the small piston is positioned at a working station, the component C runner 301 is communicated with the component C injection device 3; when the small piston is at the stop station, the C component flow passage 301 is not communicated with the C component injection device 3. That is, when the small piston is at the working position, the C component flow passage 301 is moved to face the C component injection device 3; when the small piston is at the stop station, the C component runner 301 is staggered with the C component injection device 3. Through the embodiment, the basic structure of the existing polyurethane foaming gun can be maintained, and the high-pressure injection of the material A and the material B is not influenced, the stable and synchronous addition of the component C of the premixed body of the powder and the material B in the field pouring process is realized, so that the water absorption and moisture prevention are performed through the powder in the component C, the problems that the field pouring foaming operation of the polyurethane track bed block in the prior art is greatly influenced by weather and environment, cannot be operated in a humid environment and needs to be pre-dried are solved, the pre-drying is not needed, the requirements on manpower and equipment are obviously reduced, the operation procedures are simplified, the requirements on the operation environment are reduced, and the field operation efficiency is improved.

Preferably, the device further comprises a metering cylinder 8 and a storage tank 9 which are sequentially connected with the C component injection device 3, wherein an air pressure regulating valve 10 and a stirring device 15 are arranged on the storage tank 9. In this embodiment, the component C is fed into the component C injection device 3 at high pressure through the metering cylinder.

Example 2:

in the multi-runner polyurethane foaming equipment capable of adding the powder component as shown in fig. 1 to 4, on the basis of embodiment 1, the output end of the gun head body is connected with a splitter 5, and the splitter 5 comprises two branches. The flow divider 5 comprises a base 501 and a coating 502 coated on the inner wall of the base 501, and a flow dividing regulating valve 6 is arranged on each branch. The coating 502 is any one of a teflon coating, a nano non-stick coating and a metal non-stick coating, or the substrate 501 is directly made of a polytetrafluoroethylene pipe lined.

The A component injection device 1 and the B component injection device 2 both comprise an input runner 101 and an output runner 102, and further comprise a circulating mechanism, wherein the circulating mechanism is used for enabling the input runner 101 and the output runner 102 of the A component injection device 1 to be communicated, and the input runner 101 and the output runner 102 of the B component injection device 2 to be communicated. The circulating mechanism is two circulating grooves 13 formed in the surface of the small piston 11; when the small piston 11 is positioned at a stop station, one circulation groove 13 is communicated with an input flow passage 101 and an output flow passage 102 on the component injection device 1A, and the other circulation groove 13 is communicated with the input flow passage 101 and the output flow passage 102 on the component injection device 2B; when the small piston 11 is in the working position, the circulation groove 13 is not communicated with the corresponding inlet flow passage 101.

In the prior art, polyurethane track bed blocks are poured by using a gun head corresponding to a pouring point, and for a sleeper, two sides need to be separately constructed, namely the gun head is firstly aligned to one side of the sleeper for pouring, and the whole sleeper is moved after pouring is finished, so that the gun head is aligned to the other side of the sleeper for pouring; the operation mode has low efficiency, and the pouring of one sleeper needs to be moved, positioned twice and operated twice. In the embodiment, each shunt is provided with two branches, and the distance between the two branches meets the requirement that the two branches are respectively positioned on two sides of the sleeper during operation.

In addition, when the material is not injected, the component A enters from an input runner on the component A injection device and then flows out from an output runner on the component A injection device through the circulating mechanism, and the component B is the same in principle, so that the circulation of the black material and the white material is always kept in the whole operation process, the black material and the white material are always in a uniformly mixed state, and the foaming quality is improved obviously.

Example 3:

as shown in fig. 1 to 4, in the polyurethane foaming apparatus capable of adding powder components and pouring in multiple flow paths, on the basis of any of the embodiments, the gun head body is provided with a positive pressure cleaning device 4, and the positive pressure cleaning device 4 is used for inputting positive pressure air into the gun head body; a negative pressure cleaning device 7 is arranged on each branch of the flow divider 5, and the negative pressure cleaning device 7 is used for producing negative pressure in the corresponding branch. And the release agent injection device 14 is connected with the positive pressure cleaning device 4, and the positive pressure cleaning device 4 is used for injecting the release agent into the inner wall of the flow divider.

Preferably, the positive pressure cleaning device 4 is located at the opposite side of the C-component flow passage 301, and the positive pressure cleaning device 4 comprises a sealing piston 401, and an elastic member 402 connected with the sealing piston 401; when no external force acts, the elastic piece 402 enables the sealing piston 401 to block the communication between the positive pressure cleaning device 4 and the mixing cavity 12; when the positive pressure cleaning device 4 is pressurized, the elastic member 402 deforms and drives the seal piston 401 to operate, thereby communicating the positive pressure cleaning device 4 with the mixing chamber 12. A positive pressure cleaning device is arranged on the gun head body, a negative pressure cleaning device is arranged on each fork of the splitter, after the pouring is finished, positive pressure air is immediately input into the gun head body through the positive pressure cleaning device to blow out most of residues, the residual raw materials have very strong adhesiveness, the positive pressure has very small blowing effect on the inner wall of the flow channel, the residue on the pipe wall cannot be thoroughly cleaned, after the positive pressure is finished and the positive pressure conveying is stopped, the valve is closed, negative pressure is introduced to realize secondary cleaning of the residue on the pipe wall, the residue on the pipe wall can be thoroughly cleaned secondarily because the negative pressure has a very good tearing function, therefore, the foaming material remained on the inner wall of the shunt is quickly discharged from the end parts of all branches, the phenomenon that the foaming material is solidified and blocked in the shunt is avoided, and the problem that one foaming gun is difficult to construct at multiple points simultaneously in the prior art is solved. And after the negative pressure secondary cleaning is finished, injecting a certain amount of release agent into the inner wall of the flow divider through a release agent injection device.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (9)

1. The polyurethane foaming equipment capable of adding powder components and pouring in multiple flow channels comprises a gun head body, wherein an A component injection device (1) and a B component injection device (2) are arranged on the gun head body, a small piston (11) and a mixing chamber (12) which are matched with the A component injection device (1) and the B component injection device (2) are arranged inside the gun head body, the polyurethane foaming equipment is characterized by further comprising a C component injection device (3), a C component flow channel (301) which is matched with the C component injection device (3) is arranged on the small piston (11), and the C component flow channel (301) is communicated to the mixing chamber (12); when the small piston (11) is positioned at a working station, the component C flow channel (301) is communicated with the component C injection device (3); when the small piston (11) is positioned at a stop station, the C component flow passage (301) is not communicated with the C component injection device (3); the output end of the gun head body is connected with a flow divider (5), and the flow divider (5) comprises two branched flow passages.

2. The multi-runner polyurethane foaming equipment capable of adding the powder components is characterized by further comprising a metering cylinder (8) and a storage tank (9) which are sequentially connected with the C component injection device (3), wherein a stirring device (15) is arranged on the storage tank (9).

3. The multi-runner polyurethane foaming equipment capable of adding the powder components is characterized in that the flow divider (5) comprises a base body (501), a coating (502) is coated on the inner wall of the base body (501) or the base body (501) adopts a polytetrafluoroethylene-lined pipe, and a flow dividing and adjusting valve (6) is arranged on each branched runner.

4. The multi-runner polyurethane foaming device capable of adding powder components according to claim 3, wherein the coating (502) is one or more of a Teflon coating, a nano non-stick coating and a metal non-stick coating.

5. The multi-runner pouring polyurethane foaming equipment capable of adding the powder components according to claim 1, wherein the gun head body is provided with a positive pressure cleaning device (4), the positive pressure cleaning device (4) is used for inputting positive pressure air into the gun head body, and the positive pressure air is used for cleaning foaming residues; and each branch of the flow divider (5) is provided with a negative pressure cleaning device (7), the negative pressure cleaning devices (7) are used for manufacturing negative pressure in the corresponding branches, and the negative pressure is used for cleaning foaming residues for the second time.

6. The multi-runner polyurethane foaming equipment capable of adding powder components is characterized by further comprising a release agent injection device (14) connected with the positive pressure cleaning device (4).

7. The powder component adding multi-runner casting polyurethane foaming equipment as claimed in claim 5, wherein the positive pressure cleaning device (4) is located at the opposite side of the C component runner (301), and the positive pressure cleaning device (4) comprises a sealing piston (401), and an elastic member (402) connected with the sealing piston (401); when no external force acts, the elastic piece (402) enables the sealing piston (401) to block the communication between the positive pressure cleaning device (4) and the mixing cavity (12); when the positive pressure cleaning device (4) is pressurized, the elastic piece (402) deforms and drives the sealing piston (401) to act, so that the positive pressure cleaning device (4) is communicated with the mixing cavity (12).

8. The multiple-runner polyurethane foaming equipment capable of adding the powder component is characterized in that the A-component injection device (1) and the B-component injection device (2) respectively comprise an input runner (101) and an output runner (102), and the equipment further comprises a circulating mechanism, wherein the circulating mechanism is used for enabling the input runner (101) of the A-component injection device (1) to be communicated with the output runner (102) and the input runner (101) of the B-component injection device (2) to be communicated with the output runner (102).

9. The multiple runner casting polyurethane foaming device capable of adding powder components according to claim 8, wherein the circulating mechanism is two circulating grooves (13) formed on the surface of the small piston (11);

when the small piston (11) is positioned at a stop station, one circulation groove (13) is communicated with an input flow channel (101) and an output flow channel (102) on the component A injection device (1), the other circulation groove (13) is communicated with the input flow channel (101) and the output flow channel (102) on the component B injection device (2), and meanwhile, a component C flow channel (301) matched with the component C injection device (3) is disconnected;

when the small piston (11) is in a working position, the circulation grooves (13) of the component A and the component B are not communicated with the corresponding input flow channels (101), and meanwhile, the component C injection device (3) is communicated with the matched component C flow channel (301).

Images