Grouting cleaning switching valve and control method

Abstract

The invention discloses a grouting cleaning switching valve and a control method, and relates to the technical field of grouting cleaning switching valves.The grouting cleaning switching valve is characterized in that a valve element is slidably arranged in a valve shell assembly, the end of a piston rod slidably penetrates through the valve shell assembly in a sealed mode, and a driving mechanism is arranged on the outer side of the valve shell assembly and is in transmission connection with the end of the piston rod; a cleaning assembly is arranged at the end of the piston rod and comprises a water spraying head, and the water spraying head is embedded into the outer wall of the end of the piston rod. According to the grouting and cleaning switching valve, the integrated grouting and cleaning switching valve body is arranged, the valve element is in sliding fit with the interior of the valve shell assembly, the displacement of the valve element is controlled through the driving mechanism to achieve function switching, core components are in sealed sliding fit, the matched structure is compact, no complex gap structure prone to clamping stagnation exists, abrasion of the components is small in the running process, and the service life of the components is prolonged. And the overall structure is simple, the mechanical strength is high, damage is not prone to occurring in the using process, and complex working conditions of grouting construction are adapted.

Description

Technical Field

[0001] This invention relates to the field of grouting and cleaning switching valve technology, and in particular to a grouting and cleaning switching valve and its control method. Background Technology

[0002] Grouting cleaning switching valves are widely used in grouting construction scenarios such as tunnels and underground engineering, foundation treatment, waterproofing, and ground reinforcement. During grouting construction, cleaning the grouting pipes before and after grouting operations is a key procedure to ensure continuous construction and normal use of the grouting pipes.

[0003] There are two main implementation methods for cleaning and switching grouting pipes. Traditional cleaning requires manual removal of the grouting pipe from the grout tank and placement into a clean water tank, followed by suction and pumping to complete the cleaning. This method relies entirely on manual operation, necessitating dedicated personnel for cleaning and grout switching. The intermittent nature of manual operation also reduces overall grouting efficiency and increases labor costs. In some construction scenarios, a three-way valve is connected to the grout suction pipe to switch between grout and clean water suction. However, the commercially available grouting cleaning switching valves used in these systems have design flaws. Grout tends to accumulate in the valve body and gaps. After several uses (usually three to five), the accumulated grout solidifies, causing the grouting cleaning switching valve to jam and become unusable, rendering the entire valve unusable. This necessitates frequent replacements, significantly increasing equipment and material costs. Furthermore, repairing a jammed grouting cleaning switching valve is difficult, and the effectiveness of the repair cannot be guaranteed, further reducing the equipment's practicality. Improving these issues has become a pressing problem for those skilled in the art. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the above and / or existing grouting and cleaning switching valves, the present invention is proposed.

[0006] Therefore, the problem that this invention aims to solve is that manually installing the grouting pipe is time-consuming and laborious; and connecting the three-way valve is prone to clogging.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a grouting and cleaning switching valve, comprising, Grouting and cleaning switching valve body, the grouting and cleaning switching valve body includes a valve housing assembly and a valve core disposed inside the valve housing assembly; The valve housing assembly is provided with a slurry inlet, a slurry outlet, and a water inlet; The valve core includes a piston rod and a first piston plate and a second piston plate sleeved on the piston rod, and the end of the piston rod is sealed and slides through the valve housing assembly; A drive mechanism is provided on the outside of the valve housing assembly. The drive mechanism is connected to the end of the piston rod and drives the valve core to make axial displacement within the valve housing assembly. The valve core switches between a first working position and a second working position by axial displacement: in the first working position, the passage between the slurry inlet and the slurry outlet is open, and the water inlet is closed; in the second working position, the passage between the water inlet and the slurry outlet is open, and the slurry inlet is closed.

[0008] As a preferred embodiment of the grouting and cleaning switching valve of the present invention, the valve housing assembly includes a housing, a cylindrical through hole is provided in the middle of the housing, the water inlet and the grout outlet are provided on the outer wall of the housing and communicate with the cylindrical through hole, a sealing plate is sealed to one end of the housing, and the grout inlet is provided at the other end of the housing.

[0009] In a preferred embodiment of the grouting and cleaning switching valve of the present invention, one end of the piston rod is provided with a reduced diameter section, the first piston plate and the second piston plate are both sleeved on the reduced diameter section of the piston rod, a limiting ring is fixedly connected to one side of the first piston plate, and a groove that cooperates with the limiting ring is provided on one side of the second piston plate.

[0010] In a preferred embodiment of the grouting and cleaning switching valve of the present invention, a first sealing ring is fixedly connected to the side of the first piston plate away from the second piston plate, and a sealing groove is provided on the side of the piston rod near the reduced diameter section, wherein the first sealing ring is slidably disposed in the sealing groove.

[0011] In a preferred embodiment of the grouting and cleaning switching valve of the present invention, a sealing abutment ring is fixedly connected to the tail of the piston rod, and a second sealing ring is fixedly connected to the side of the second piston plate away from the first piston plate, wherein the second sealing ring and the sealing abutment ring are in sealing contact.

[0012] In a preferred embodiment of the grouting and cleaning switching valve of the present invention, a cleaning assembly is provided at the end of the piston rod, the cleaning assembly includes a water spray head, the water spray head is embedded and installed on the outer wall of the end of the piston rod, the second piston plate is slidably sleeved on the outside of the piston rod and slidably abuts against the water spray head, and the water spray head is correspondingly arranged with the inner wall between the grout inlet and the grout outlet.

[0013] In a preferred embodiment of the grouting and cleaning switching valve of the present invention, the cleaning assembly further includes a guide rail, which is equally spaced and installed around the inner wall of the second piston plate and is inclined. A guide block is fixedly connected to the outer wall of the piston rod. The guide block slides within the guide rail, causing the valve core to rotate circumferentially when it is axially displaced. A drain pipe is provided on the second piston plate. A matching through hole and a closed guide groove are opened at the corresponding position of the first piston plate. When the second piston plate rotates to the corresponding position, the drain pipe and the matching through hole are connected to form a wastewater discharge channel.

[0014] As a preferred embodiment of the grouting and cleaning switching valve of the present invention, wherein: a hinge rod is fixedly connected to both sides of the spray head, a rectangular groove is equally divided around the outer wall of the piston rod, the spray head is hinged and installed in the rectangular groove in conjunction with the hinge rod and the torsion spring, a cylindrical water inlet pipe is provided in the middle of the piston rod, and a pipe communicating with the water inlet pipe is provided on the outer side of the piston rod near the drive mechanism.

[0015] As another preferred embodiment of the present invention, a control method for a grouting and cleaning switching valve includes: a drive mechanism driving the valve core to move axially to a first working position, so that the grout inlet and outlet are connected and the water inlet is closed, and grouting operation is performed; the valve core scrapes and cleans the inner wall of the valve housing assembly through the first piston plate and the second piston plate. The drive mechanism drives the valve core to move axially to the second working position, so that the water inlet and the slurry outlet are connected and the slurry outlet is closed. At the same time, the second piston plate rotates circumferentially under the cooperation of the guide rail and the guide block, and the water spray head automatically unfolds to flush the valve body cavity. The second piston plate rotates to a preset angle, and the drain pipe connects with the matching through hole and the closed guide groove to form a waste discharge channel. The cleaning wastewater is discharged from the valve body through the waste discharge channel. The valve core is moved axially in a small reciprocating motion, so that the spray head swings under the action of the guide ring, achieving multi-angle cleaning without dead angles.

[0016] The beneficial effects of this invention are as follows: This grouting and cleaning switching valve is equipped with an integrated grouting and cleaning switching valve body, with a valve core slidingly fitted inside the valve shell assembly. The function switching is achieved by controlling the displacement of the valve core through a drive mechanism. The core components are sealed and slidingly fitted, with a compact fit structure and no complex gap structure that is prone to jamming. The components experience little wear during operation, and the overall structure is simple and has high mechanical strength. It is not easily damaged during use and is suitable for the complex working conditions of grouting construction.

[0017] The valve core is equipped with a first piston plate, a second piston plate, and a multi-seal structure. When switching between grout suction and cleaning modes, the displacement of the valve core can scrape and clean the inner wall of the valve housing assembly. At the same time, it is equipped with a dedicated cleaning component that can precisely flush the inner wall of the piston rod and the inside of the valve housing assembly. Both structural design and functional configuration prevent grout from accumulating and solidifying in the valve body, completely solving the problem of easy jamming of existing grouting and cleaning switching valves, greatly extending the service life of the equipment and reducing the frequency of equipment replacement.

[0018] The cleaning assembly includes components such as spray nozzles, guide rails, and drain pipes. During cleaning, the spray nozzles automatically stand up and swing up and down to rinse the inner wall of the piston rod from multiple angles. At the same time, the water inlet can simultaneously introduce water to rinse the grout outlet and external equipment. After the second piston plate rotates, the drain pipe can quickly discharge the cleaning wastewater, achieving a comprehensive and thorough cleaning of the valve body cavity and external pipelines. This ensures a thorough cleaning effect, prevents residual grout from affecting the quality of subsequent grouting operations, and guarantees the subsequent performance of the grouting pipe and grouting cleaning switching valve. This valve adopts a dual-piston linkage displacement and inclined guide rail rotation coupling structure, which synchronously transforms the axial drive action into the rotary waste discharge and automatic opening and closing action of the spray head. It does not require additional motors, sensors or pneumatic actuators, and realizes multi-action coordinated operation with a single drive. The whole has no exposed vulnerable parts, no complex transmission chain, and no dead corners for slurry accumulation. It still maintains low friction, high reliability and long-term maintenance-free operation in environments with high solids content and easily solidified slurry. The structural redundancy and adaptability to working conditions are significantly improved.

[0019] The valve core is equipped with multiple sealing structures, including a first sealing ring, a second sealing ring, and a sealing abutment ring. During grout suction and cleaning, each sealing structure can achieve precise sealing and abutment, effectively preventing grout from leaking from the gaps in the valve body during grouting. It can also prevent clean water from mixing with residual grout during cleaning, ensuring the purity of grout suction and the effectiveness of cleaning. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a structural diagram of one side of the grouting and cleaning switching valve.

[0022] Figure 2 This is a diagram of the internal structure of the grouting and cleaning switching valve.

[0023] Figure 3 This is a structural diagram of the valve housing assembly for the grouting and cleaning switching valve.

[0024] Figure 4 This is a structural diagram of the valve core for the grouting and cleaning switching valve.

[0025] Figure 5 This is a structural diagram of the cleaning component for the grouting and cleaning switching valve.

[0026] Figure 6 For grouting and cleaning switching valve Figure 5 Enlarged view of section A in the middle.

[0027] In the diagram: 100, drive mechanism; 200, grouting and cleaning switching valve body; 210, valve housing assembly; 211, housing; 212, water inlet; 213, grout outlet; 214, grout inlet; 215, sealing plate; 220, valve core; 221, piston rod; 222, first piston plate; 223, second piston plate; 224, first sealing ring; 225, second sealing ring; 226, sealing abutment ring; 227, limiting ring; 228, sealing groove; 230, cleaning assembly; 231, water spray head; 232, hinge rod; 233, guide block; 234, guide rail; 235, guide ring; 236, drain pipe; 237, closed guide groove. Detailed Implementation

[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0031] Example 1, referring to Figures 1-6 This is the first embodiment of the present invention, which provides a grouting and cleaning switching valve and a control method, the grouting and cleaning switching valve and the control method including Grouting and cleaning switching valve body 200, which includes valve housing assembly 210 and valve core 220 disposed inside valve housing assembly 210; The valve housing assembly 210 is provided with a slurry inlet 214, a slurry outlet 213 and a water inlet 212; Valve core 220 includes piston rod 221 and a first piston plate 222 and a second piston plate 223 sleeved on piston rod 221. The end of piston rod 221 is sealed and slides through valve housing assembly 210. A drive mechanism 100 is provided on the outside of valve housing assembly 210. The drive mechanism 100 is drivenly connected to the end of piston rod 221, driving valve core 220 to make axial displacement within valve housing assembly 210. Valve core 220 switches between a first working position and a second working position through axial displacement: in the first working position, slurry is fed in. The passage between the inlet 214 and the outlet 213 is open, while the inlet 212 is closed; in the second working position, the passage between the inlet 212 and the outlet 213 is open, while the inlet 214 is closed; the function is switched by controlling the displacement of the valve core 220 through the drive mechanism 100. The core components are sealed and slidingly fitted, with a compact fit structure and no complex gap structure that is easy to jam. The components wear little during operation, the overall structure is simple and has high mechanical strength, and it is not easily damaged during use, making it suitable for complex working conditions of grouting construction.

[0032] The drive mechanism 100 can be either a cylinder or an electric push rod, which can be flexibly selected according to different working conditions of grouting construction to improve the adaptability of the equipment; the sealing passage between the piston rod 221 and the valve housing assembly 210 is made of fluororubber sealing sleeve. The fluororubber sealing sleeve is resistant to grout corrosion and wear, and can effectively prevent grout leakage and water seepage, thereby improving the sealing performance.

[0033] The valve housing assembly 210 includes a housing 211, with a cylindrical through hole in the middle of the housing 211. The outer wall of the piston rod 221 is connected to a water inlet 212 and a slurry outlet 213. The cylindrical through hole of the housing 211 provides precise sliding guidance for the valve core 220, ensuring the accuracy of the path switching during the displacement of the valve core 220. The water inlet 212 provides a clean water path for the cleaning process, and the slurry outlet 213 provides a slurry path for the grouting process. The two paths are set independently to avoid the slurry from mixing with the clean water, ensuring the purity of the grouting and the cleaning effect.

[0034] Valve housing assembly 210 includes housing 211, with a cylindrical through hole in the middle of housing 211. A water inlet 212 and a slurry outlet 213 are located on the outer wall of housing 211 and communicate with the cylindrical through hole. A sealing plate 215 is sealed to one end of housing 211, and a slurry inlet 214 is provided at the other end of housing 211. This forms a closed chamber for sliding valve core 220, preventing leakage of slurry and water from the valve body. The slurry inlet 214 provides a passage for slurry to enter the valve body. The reduced diameter section design allows the first piston plate 222 and the second piston plate 223 to have axial sliding space on the piston rod 221. This provides a motion basis for the opening and closing of the sealing structure. At the same time, the stepped surface of the reduced diameter section can limit the sliding of the piston plate and prevent the piston plate from excessive displacement and falling off. The clearance fit between the limiting ring 227 and the groove can guide the relative rotation of the first piston plate 222 and the second piston plate 223, ensuring the synchronization and accuracy of the rotation of the two piston plates and avoiding misalignment and jamming. The first piston plate 222 and the second piston plate 223 are both made of polytetrafluoroethylene (PTFE). PTFE has good self-lubricating properties and a low coefficient of friction, reducing sliding wear with the inner wall of the housing 211. At the same time, it is resistant to slurry corrosion and does not easily accumulate slurry.

[0035] One end of the piston rod 221 has a reduced diameter section. The first piston plate 222 and the second piston plate 223 are both fitted onto the reduced diameter section of the piston rod 221. A limit ring 227 is fixedly connected to one side of the first piston plate 222, and a groove that mates with the limit ring 227 is provided on one side of the second piston plate 223. The reduced diameter section of the piston rod 221 provides the first piston plate 222 and the second piston plate 223 with dual movement space for axial sliding and circumferential rotation. The fit between the limit ring 227 and the groove enables the movement of the two piston plates to be linked, ensuring that the movement of the two piston plates is coordinated and consistent during the displacement of the valve core 220, thereby achieving precise opening and closing of the sealing structure and synchronous start-up of the cleaning component. The outer walls of the first piston plate 222 and the second piston plate 223 are fitted with sealing rings for sealing.

[0036] A first sealing ring 224 is fixedly connected to the side of the first piston plate 222 away from the second piston plate 223. A sealing groove 228 is provided on the side of the piston rod 221 near the reduced diameter section. The first sealing ring 224 is slidably disposed in the sealing groove 228. The sealing groove 228 provides installation and sliding guidance for the first sealing ring 224. When the first piston plate 222 moves with the valve core 220, the first sealing ring 224 slides axially in the sealing groove 228, always maintaining a sealing contact with the inner wall of the sealing groove 228, thereby achieving a dynamic seal between the piston rod 221 and the first piston plate 222 and blocking the flow of liquid.

[0037] A sealing abutment ring 226 is fixedly connected to the tail of the piston rod 221. A second sealing ring 225 is fixedly connected to the side of the second piston plate 223 away from the first piston plate 222. The second sealing ring 225 and the sealing abutment ring 226 are sealed and abutted. In the slurry suction state, the valve core 220 moves towards the water inlet 212. The second piston plate 223 moves closer to the sealing abutment ring 226 under the action of friction, so that the second sealing ring 225 and the sealing abutment ring 226 are tightly abutted, blocking the connection between the clear water passage and the slurry passage. At the same time, the first sealing ring 224 is sealed and abutted with the sealing groove 228. The double sealing structure realizes the independent closure of the slurry passage, ensuring no leakage and no slurry mixing during the slurry suction process.

[0038] Example 2, refer to Figures 3-5 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0039] Specifically, a cleaning assembly 230 is provided at the end of the piston rod 221. The cleaning assembly 230 includes a water spray head 231, which is embedded in the outer wall of the end of the piston rod 221. The second piston plate 223 is slidably sleeved on the outside of the piston rod 221 and slides against the water spray head 231. The water spray head 231 is correspondingly provided on the inner wall between the slurry inlet 214 and the slurry outlet 213.

[0040] The cleaning assembly 230 also includes guide rails 234, which are evenly distributed and installed around the inner wall of the second piston plate 223, and are all inclined. A guide block 233 is fixedly connected to the outer wall of the piston rod 221. The guide block 233 slides within the guide rails 234, causing the valve core 220 to rotate circumferentially when the valve core 220 is axially displaced. A drain pipe 236 is provided on the second piston plate 223. A matching through hole and a closed guide groove 237 are provided at the corresponding position on the first piston plate 222. The second piston plate 223 rotates to... When in the corresponding position, the drain pipe 236 and the matching through hole are connected to form a wastewater discharge channel; when the valve core 220 moves axially towards the slurry inlet 214, the guide block 233 on the piston rod 221 slides along the inclined guide rail 234 on the inner wall of the second piston plate 223 to limit the movement. By utilizing the inclined structure of the guide rail 234, the axial linear motion of the guide block 233 is converted into the circumferential rotational motion of the second piston plate 223, providing the rotational docking power for the discharge channel of the cleaning wastewater, realizing the linkage between displacement and rotation, without the need for additional rotational drive components.

[0041] Hinged rods 232 are fixedly connected to both sides of the spray head 231. A rectangular groove is evenly spaced around the outer wall of the piston rod 221. The spray head 231 is hinged within the rectangular groove in conjunction with the hinged rods 232 and a torsion spring. A cylindrical water inlet pipe is located in the middle of the piston rod 221. A pipe communicating with the water inlet pipe is located on the outer side of the end of the piston rod 221 closest to the drive mechanism 100. A guide ring 235 is provided at the outer end of the second sealing ring 225, and the guide ring 235 slides against the outer wall of the spray head 231. The second piston plate 223 rotates circumferentially as the guide block 233 slides, causing the drain pipe 236 to rotate synchronously. When the drain pipe 236 rotates to the position corresponding to the through hole and the closed guide groove 237 on the first piston plate 222, a discharge passage for cleaning wastewater is formed. The cleaning wastewater inside the valve body enters the closed guide groove 237 through the drain pipe 236 and the through hole of the first piston plate 222, and is finally discharged outside the valve body, realizing the rapid and directional discharge of cleaning wastewater and avoiding the accumulation of wastewater inside the valve body.

[0042] In the non-cleaning state, the spray head 231 compresses the torsion spring under the action of the second piston plate 223 and is housed in the rectangular groove of the piston rod 221. In the cleaning state, the second piston plate 223 moves away from the spray head 231, and the restoring force of the torsion spring drives the spray head 231 to rotate and stand up around the hinge point through the hinge rod 232. Clean water is transported to the spray head 231 through the water inlet pipe in the middle of the piston rod 221 and sprayed out from the spray nozzle to achieve flushing inside the valve body. The one-way valve effectively blocks the backflow path of the slurry and ensures the cleanliness of the clean water pipeline.

[0043] During the cleaning process, when the piston rod 221 is pulled back and forth slightly, the axial displacement of the piston rod 221 causes the spray head 231 to move synchronously. The guide ring 235 slides against the outer wall of the spray head 231. The contact force pushes the spray head 231 to swing up and down around the hinge rod 232 at a small angle, changing the spray angle of the spray head 231. This achieves multi-angle, no-dead-angle rinsing of the inner wall of the piston rod 221, improving the comprehensiveness and cleanliness of the cleaning. At the same time, the scraping action of the guide ring 235 can remove the slurry adhering to the outer wall of the spray head 231, preventing the spray nozzle from clogging. The spray head 231 can be used for cleaning first, and then water can be introduced through the inlet 212 to clean subsequent equipment.

[0044] Additional drive control module: A displacement sensor is installed at the transmission connection between the drive mechanism 100 and the piston rod 221. The displacement sensor is electrically connected to the main control system for grouting construction and can detect the axial displacement distance of the valve core 220 in real time, accurately control the displacement stroke of the valve core 220, and achieve precise switching between grout suction and cleaning states, avoiding component damage and path switching errors caused by excessive displacement. At the same time, an electromagnetic reversing valve (pneumatic / hydraulic cylinder driven) or a servo controller (electric cylinder driven) is installed at the power input end of the drive mechanism 100, which can realize the automatic start and stop and forward and reverse motion control of the drive mechanism 100, and achieve fully automatic process linkage of grouting and cleaning in conjunction with the main control system.

[0045] Pressure monitoring and protection components: Pressure sensors are installed at the slurry inlet 214, slurry outlet 213, and water inlet 212. These sensors are electrically connected to the main control system and can monitor the pressure values ​​of each passage in real time. When the pressure at the slurry inlet 214 is too high, the main control system can control the drive mechanism 100 to stop operating, preventing damage to the valve body sealing structure due to excessive slurry pressure. When the pressure at the water inlet 212 is insufficient, an alarm signal can be issued to remind operators to check the clean water supply pipeline in a timely manner to ensure the cleaning effect. Simultaneously, pressure relief valves are installed next to the pressure sensors in each passage. The pressure relief value of the valves can be adjusted according to construction needs. When the pipeline pressure exceeds the set value, the pressure relief valve automatically opens to release pressure, achieving pressure protection for the valve body and pipeline, and preventing equipment damage due to overpressure.

[0046] A control method for a grouting and cleaning switching valve includes a grouting and cleaning switching valve. The control method includes a drive mechanism 100 driving the valve core 220 to move axially to a first working position, so that the grout inlet 214 and the grout outlet 213 are connected and the water inlet 212 is closed to perform grouting operation. The valve core 220 scrapes and cleans the inner wall of the valve housing assembly 210 through the first piston plate 222 and the second piston plate 223. The drive mechanism 100 drives the valve core 220 to move axially to the second working position, so that the water inlet 212 and the slurry outlet 213 are connected and the slurry inlet 214 is closed. At the same time, the second piston plate 223 rotates circumferentially under the cooperation of the guide rail 234 and the guide block 233, and the water spray head 231 automatically unfolds to flush the valve body cavity. The second piston plate 223 rotates to a preset angle, and the drain pipe 236 connects with the matching through hole and the closed guide groove 237 to form a waste discharge channel. The cleaning wastewater is discharged from the valve body through the waste discharge channel. The valve core 220 is moved axially in a small reciprocating motion, so that the spray head 231 swings under the action of the guide ring 235, realizing multi-angle cleaning without dead angles.

[0047] In use: the drive mechanism 100 drives the valve core 220 to move axially towards the inlet 212. The first piston plate 222 and the second piston plate 223 of the valve core 220 generate sliding friction with the inner wall of the housing 211. Under the action of friction, the first piston plate 222 and the second piston plate 223 move as a whole towards one end of the sealing abutment ring 226. At this time, the first sealing ring 224 seals against the inside of the sealing groove 228, and the end of the second sealing ring 225 seals against the sealing abutment ring 226, forming a reliable sealing fit. The slurry enters the grouting and cleaning switching valve body 200 from the slurry inlet 214, passes through the mating cavity between the housing 211 and the valve core 220, and is discharged from the slurry outlet 213, completing the slurry suction and grouting operation.

[0048] In the initial stage of valve core 220 displacement, the first piston plate 222 and the second piston plate 223 first generate sliding friction with the inner wall of housing 211, causing the first piston plate 222 and the second piston plate 223 to move as a whole away from the sealing abutment ring 226. The first sealing ring 224 seals and abuts with the other side of the sealing groove 228, and the sealing structure of the slurry suction channel is unlocked. At the same time, the water spray head 231 at the end of piston rod 221 is fully exposed as valve core 220 displacements. Under the elastic force of torsion spring, the water spray head 231 slowly stands up to prepare for flushing.

[0049] Water is supplied to the cylindrical water inlet pipe in the middle of the piston rod 221. Clean water is sprayed out from the spray head 231 through the water inlet pipe to rinse the inner wall of the piston rod 221. At the same time, water is supplied through the water inlet 212, and the clean water is used to rinse the inside of the housing 211, the grout outlet 213 and the grouting equipment connected to the grout outlet 213, so as to achieve all-round cleaning inside and outside.

[0050] The second piston plate rotates, and wastewater is discharged: During the displacement of the valve core 220 towards the grout inlet 214, the guide block 233 on the outer wall of the piston rod 221 slides within the inclined guide rail 234 on the inner wall of the second piston plate 223. When the guide block 233 passes the guide rail 234, it drives the second piston plate 223 to rotate around the piston rod 221. The drain pipe 236 on the second piston plate 223 rotates to the position corresponding to the closed guide groove 237 on the first piston plate 222, forming a wastewater discharge channel. The wastewater generated by the spray head 231 and the rinsing wastewater from the inlet 212 are quickly discharged outside the grouting cleaning switching valve body 200 through the drain pipe 236 and the closed guide groove 237. When pulled, the closed guide groove 237 will compress the drain pipe 236, thus sealing it.

[0051] During the cleaning process, the piston rod 221 is pulled back and forth slightly. The guide ring 235 at the outer end of the second sealing ring 225 moves with the piston rod 221 and pushes the water spray head 231, causing the water spray head 231 to swing up and down around the hinge rod 232 to adjust the spray angle, thereby achieving multi-angle rinsing of the inner wall of the piston rod 221 and greatly improving the comprehensiveness and efficiency of the cleaning.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A grouting and cleaning switching valve, characterized in that: include, Grouting and cleaning switching valve body (200), the grouting and cleaning switching valve body (200) includes a valve housing assembly (210) and a valve core (220) disposed inside the valve housing assembly (210). The valve housing assembly (210) is provided with a slurry inlet (214), a slurry outlet (213), and a water inlet (212). The valve core (220) includes a piston rod (221) and a first piston plate (222) and a second piston plate (223) sleeved on the piston rod (221). The end of the piston rod (221) is sealed and slides through the valve housing assembly (210). A drive mechanism (100) is provided on the outside of the valve housing assembly (210). The drive mechanism (100) is connected to the end of the piston rod (221) and drives the valve core (220) to make axial displacement within the valve housing assembly (210). The valve core (220) switches between a first working position and a second working position by axial displacement: in the first working position, the passage between the slurry inlet (214) and the slurry outlet (213) is open, and the water inlet (212) is closed; in the second working position, the passage between the water inlet (212) and the slurry outlet (213) is open, and the slurry inlet (214) is closed.

2. The grouting and cleaning switching valve as described in claim 1, characterized in that: The valve housing assembly (210) includes a housing (211), a cylindrical through hole is provided in the middle of the housing (211), the water inlet (212) and the slurry outlet (213) are provided on the outer wall of the housing (211) and communicate with the cylindrical through hole, a sealing plate (215) is sealed to one end of the housing (211), and the slurry inlet (214) is provided at the other end of the housing (211).

3. The grouting and cleaning switching valve as described in claim 2, characterized in that: One end of the piston rod (221) has a reduced diameter section. The first piston plate (222) and the second piston plate (223) are both sleeved on the reduced diameter section of the piston rod (221). A limiting ring (227) is fixedly connected to one side of the first piston plate (222), and a groove that cooperates with the limiting ring (227) is provided on one side of the second piston plate (223).

4. The grouting and cleaning switching valve as described in claim 3, characterized in that: A first sealing ring (224) is fixedly connected to the side of the first piston plate (222) away from the second piston plate (223). A sealing groove (228) is provided on the side of the piston rod (221) near the reduced diameter section. The first sealing ring (224) is slidably disposed in the sealing groove (228).

5. The grouting and cleaning switching valve as described in claim 4, characterized in that: A sealing abutment ring (226) is fixedly connected to the tail of the piston rod (221), and a second sealing ring (225) is fixedly connected to the side of the second piston plate (223) away from the first piston plate (222), and the second sealing ring (225) seals against the sealing abutment ring (226).

6. The grouting and cleaning switching valve as described in any one of claims 1, characterized in that: The piston rod (221) is provided with a cleaning assembly (230) at its end. The cleaning assembly (230) includes a water spray head (231). The water spray head (231) is embedded in the outer wall of the end of the piston rod (221). The second piston plate (223) is sealed and slidably sleeved on the outside of the piston rod (221) and slides against the water spray head (231). The water spray head (231) is correspondingly provided with the inner wall between the slurry inlet (214) and the slurry outlet (213).

7. The grouting and cleaning switching valve as described in claim 6, characterized in that: The cleaning assembly (230) also includes a guide rail (234), which is equally divided and installed around the inner wall of the second piston plate (223) and is inclined. The outer wall of the piston rod (221) is fixedly connected to a guide block (233). The guide block (233) slides within the guide rail (234) to limit the movement of the valve core (220) in the axial direction, thereby causing the second piston plate (223) to rotate circumferentially. A drain pipe (236) is provided on the second piston plate (223). A matching through hole and a closed guide groove (237) are opened at the corresponding position of the first piston plate (222). When the second piston plate (223) rotates to the corresponding position, the drain pipe (236) and the matching through hole are connected to form a wastewater discharge channel.

8. The grouting and cleaning switching valve as described in claim 6, characterized in that: The spray head (231) is fixedly connected to two sides by hinge rods (232). The outer wall of the piston rod (221) is equally divided into rectangular grooves. The spray head (231) is hinged in the rectangular grooves in conjunction with the hinge rods (232) and the torsion spring. A cylindrical water inlet pipe is provided in the middle of the piston rod (221). A pipe communicating with the water inlet pipe is provided on the outer side of the piston rod (221) near the drive mechanism (100).

9. A control method for a grouting and cleaning switching valve, characterized in that, The grouting and cleaning switching valve according to any one of claims 1-8 is controlled by a drive mechanism (100) driving the valve core (220) to move axially to a first working position, so that the grout inlet (214) and the grout outlet (213) are connected and the water inlet (212) is closed, and grouting operation is performed. The valve core (220) scrapes and cleans the inner wall of the valve housing assembly (210) through the first piston plate (222) and the second piston plate (223). The drive mechanism (100) drives the valve core (220) to move axially to the second working position, so that the water inlet (212) and the slurry outlet (213) are connected and the slurry inlet (214) is closed. At the same time, the second piston plate (223) rotates circumferentially under the cooperation of the guide rail (234) and the guide block (233), and the water spray head (231) automatically unfolds to flush the valve body cavity. The second piston plate (223) rotates to a preset angle, and the drain pipe (236) connects with the through hole and the closed guide groove (237) to form a waste discharge channel. The cleaning wastewater is discharged from the valve body through the waste discharge channel. The valve core (220) is driven to move axially in a small reciprocating motion, so that the spray head (231) swings under the action of the guide ring (235) to achieve multi-angle cleaning without dead angles.

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