Valve group assembly for grouting pump

Abstract

The utility model relates to the technical field of valve banks, and provides a valve bank assembly for a grouting pump, a main flow channel, a first branch flow channel, a second branch flow channel, an automatic pressure relief channel and a manual pressure relief channel are arranged on a valve body, one end of the main flow channel is used for communicating with the outlet end of the grouting pump, and the other end of the main flow channel is used for communicating with a grouting pipe; the first sub-runner and the second sub-runner are communicated with the main runner; the sealing piston is arranged between the first sub-runner and the automatic pressure relief channel in a sliding mode, and after the sealing piston slides, the automatic pressure relief channel and the first sub-runner are communicated or disconnected; the valve element is movably or rotatably arranged between the second sub-runner and the manual pressure relief channel, and after the valve element moves or rotates, the manual pressure relief channel and the second sub-runner are communicated or disconnected. By means of the technical scheme, the number of installation steps and needed space can be reduced, installation time and labor cost can be saved, and meanwhile the space layout on the periphery of the grouting pump is more compact and reasonable.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of valve assembly technology, and more specifically, to a valve assembly for a grouting pump. Background Technology

[0002] In coal mine goaf remediation operations, large quantities of cement slurry, fly ash slurry, and other media need to be injected into the goaf. To ensure construction safety, the grouting pump must be equipped with a safety valve that can automatically open in case of abnormal pressure rise. A manual pressure relief bypass must be configured when the pump is stopped for maintenance or after grouting is completed. This allows for manual pressure relief of the pump-to-wellhead valve pipeline and the pump itself before stopping the pump for maintenance or dismantling the pipeline, ensuring construction safety. The safety valve and the manual pressure relief valve are two independent valves that require separate installation, which is time-consuming, labor-intensive, and space-consuming. Furthermore, current safety valves and manual pressure relief valves are prone to clogging and failure, which can affect construction efficiency. Utility Model Content

[0003] To overcome the above-mentioned defects, the embodiments of this disclosure provide a valve assembly for a grouting pump, which solves the technical problems in the related art that safety valves and manual pressure relief valves need to be installed separately, which is time-consuming, labor-intensive, and takes up a lot of space.

[0004] According to one aspect, at least one embodiment of this disclosure provides a valve assembly for a grouting pump, for connecting the outlet end of the grouting pump to a grouting pipe, said valve assembly for a grouting pump comprising:

[0005] The valve body has a main flow channel, a first branch flow channel, a second branch flow channel, an automatic pressure relief channel, and a manual pressure relief channel. One end of the main flow channel is used to connect to the outlet end of the grouting pump, and the other end of the main flow channel is used to connect to the grouting pipe. The first branch flow channel and the second branch flow channel are both connected to the main flow channel.

[0006] A sealing piston is slidably disposed between the first diversion channel and the automatic pressure relief channel. After the sealing piston slides, it is used to connect or disconnect the automatic pressure relief channel from the first diversion channel.

[0007] A valve core is movable or rotatably disposed between the second diversion channel and the manual pressure relief channel. After the valve core is moved or rotated, it is used to connect or disconnect the manual pressure relief channel from the second diversion channel.

[0008] For example, in at least one embodiment of this disclosure, a valve assembly for a grouting pump is provided, which further includes a pressure relief valve stem. The pressure relief valve stem is detachably connected to the valve body. The inner end of the pressure relief valve stem abuts against the valve core and seals the valve core against the second diversion channel. The outer end of the pressure relief valve stem is located outside the valve body. After the pressure relief valve stem moves or rotates under external force, the valve core separates from the second diversion channel under the pressure in the main flow channel, thereby connecting the manual pressure relief channel with the second diversion channel.

[0009] For example, in at least one embodiment of the present disclosure, a valve assembly for a grouting pump is provided, wherein the valve assembly further includes a handle connected to the outer end of the pressure relief valve stem.

[0010] For example, in at least one embodiment of the present disclosure, a valve assembly for a grouting pump further includes:

[0011] A sliding top fitting is inserted into the valve body and forms a sliding fit. The sliding top fitting is perpendicular to the main channel. The inner end of the sliding top fitting is located inside the main channel, and the outer end of the sliding top fitting is located outside the valve body.

[0012] A limiting platform is disposed around the unblocking top component and located inside the main channel. After the unblocking top component slides, the limiting platform is used to contact or separate from the inner wall of the valve body.

[0013] For example, in a valve assembly for a grouting pump provided in at least one embodiment of this disclosure, the unblocking top is coaxially arranged with the second diversion channel, and the inner end of the unblocking top extends into the second diversion channel.

[0014] For example, in a grouting pump valve assembly provided in at least one embodiment of this disclosure, the portion of the unblocking top member located on the side of the limiting platform facing the second diversion channel is conical, and its diameter decreases linearly from one end near the limiting platform to the other end.

[0015] For example, in a valve assembly for a grouting pump provided in at least one embodiment of this disclosure, the valve body includes:

[0016] The main valve block, the main flow channel, the first branch channel, the second branch channel and the automatic pressure relief channel are all located on the main valve block, the first branch channel is located outside the main flow channel and the automatic pressure relief channel is located outside the first branch channel;

[0017] An automatic pressure relief valve block is disposed on the main valve block and located on the outer side of the first diversion channel away from the main channel. The automatic pressure relief valve block has a valve cavity that communicates with the first diversion channel. After the sealing piston slides into the valve cavity, it is used to connect the automatic pressure relief channel with the first diversion channel.

[0018] For example, in a valve assembly for a grouting pump provided in at least one embodiment of this disclosure, the second diversion channel is located on the main valve block and outside the main channel. The valve body also includes a manual pressure relief valve block, which is disposed on the main valve block and located on the outer side of the second diversion channel away from the main channel. The manual pressure relief channel is located on the manual pressure relief valve block and on the side of the valve core away from the main channel. After the valve core moves or rotates into the manual pressure relief channel under the action of external force, it is used to connect the manual pressure relief channel with the second diversion channel.

[0019] For example, in at least one embodiment of the present disclosure, a valve assembly for a grouting pump further includes:

[0020] A protective cover is disposed on the automatic pressure relief valve block and located at the end of the automatic pressure relief valve block away from the main flow channel;

[0021] A shearing plate is located inside the protective cover. One end of the shearing plate is hinged to the automatic pressure relief valve block, and the hinge axis is the same as the axis of the main channel. The other end of the shearing plate is a free end.

[0022] A safety pin is inserted into both the middle of the shear plate and the automatic pressure relief valve block.

[0023] A piston rod, one end of which is connected to the sealing piston and the other end of which abuts against the shearing plate. After the sealing piston and the piston rod slide toward the protective cover, the safety pin is sheared off, and the free end of the shearing plate flips away from the piston rod.

[0024] For example, in a valve assembly for a grouting pump provided in at least one embodiment of this disclosure, the valve assembly for a grouting pump further includes a buffer pad, which is disposed in the valve cavity and located at one end of the valve cavity away from the main flow channel, and the piston rod is inserted into the buffer pad to form a sliding fit.

[0025] The beneficial effects of the embodiments disclosed herein are as follows: The main channel on the valve body connects the outlet end of the grouting pump and the grouting pipe, serving as the main channel for media flow. When the outlet pressure of the grouting pump is normal, the sealing piston is located between the inlet end of the automatic pressure relief channel and the first diversion channel, sealing the automatic pressure relief channel and preventing media from flowing into it. Once the grouting pump experiences an abnormal pressure increase, the pressure in the main channel increases, generating sufficient thrust on the sealing piston to overcome resistance and slide away from the main channel. The inlet end of the automatic pressure relief channel is opened, and the high-pressure media in the main channel flows to the outside through the first diversion channel and the automatic pressure relief channel, thereby reducing the pressure within the system and achieving automatic pressure relief, preventing safety accidents caused by excessive pressure.

[0026] The second diversion channel is connected to the main channel. During normal operation, the valve core is in close contact with the outlet end of the second diversion channel to prevent the medium from entering the manual pressure relief channel. When manual pressure relief is required, such as after pump shutdown for maintenance or grouting, the valve core is moved or rotated away from the main channel and separated from the outlet end of the second diversion channel, thus connecting the second diversion channel with the manual pressure relief channel. In this way, the medium in the main channel can be discharged through the second diversion channel and the manual pressure relief channel, achieving manual pressure relief. This ensures that the pressure in the pipeline from the pump end to the wellhead valve and inside the pump is released before pump shutdown for maintenance or pipeline removal, ensuring construction safety.

[0027] This disclosure integrates manual and automatic pressure relief into a single valve block, reducing installation steps and space requirements. Construction workers no longer need to install two separate valves, saving installation time and labor costs. It also allows for a more compact and efficient layout around the grouting pump, improving space utilization at the construction site. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of one embodiment of the present disclosure;

[0030] Figure 2 This is a schematic diagram of the connection structure between the manual pressure relief valve block and the main valve block in one embodiment of this disclosure;

[0031] Figure 3 This is a schematic diagram of the connection structure between the automatic pressure relief valve block and the main valve block in one embodiment of this disclosure.

[0032] In the diagram: 1. Valve body; 1-1. Main valve block; 1-2. Automatic pressure relief valve block; 1-3. Manual pressure relief valve block; 2. Sealing piston; 3. Valve core; 4. Main flow channel; 5. First branch channel; 6. Second branch channel; 7. Automatic pressure relief channel; 8. Manual pressure relief channel; 9. Pressure relief valve stem; 10. Handle; 11. Unblocking top piece; 12. Limiting platform; 13. Valve chamber; 14. Protective cover; 15. Shearing plate; 16. Safety pin; 17. Piston rod; 18. Buffer pad. Detailed Implementation

[0033] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0034] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0035] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0036] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0038] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] like Figures 1-3 The diagram illustrates a valve assembly for a grouting pump according to an embodiment of this disclosure, used to connect the outlet end of the grouting pump to the grouting pipe. It includes a valve body 1, a sealing piston 2, and a valve core 3. The valve body 1 has a main flow channel 4, a first branch flow channel 5, a second branch flow channel 6, an automatic pressure relief channel 7, and a manual pressure relief channel 8. One end of the main flow channel 4 is connected to the outlet end of the grouting pump, and the other end is connected to the grouting pipe. The first branch flow channel 5 and the second branch flow channel 6 are both connected to the main flow channel 4. The sealing piston 2 is slidably disposed between the first branch flow channel 5 and the automatic pressure relief channel 7. After the sealing piston 2 slides, it connects or disconnects the automatic pressure relief channel 7 from the first branch flow channel 5. The valve core 3 is movable or rotatably disposed between the second branch flow channel 6 and the manual pressure relief channel 8. After the valve core 3 moves or rotates, it connects or disconnects the manual pressure relief channel 8 from the second branch flow channel 6.

[0040] For example, such as Figure 1 As shown, taking the main channel 4 horizontally arranged in the front-to-back direction, the first branch channel 5 located to the right of the main channel 4, and the second branch channel 6 located above the main channel 4 as an example, the main channel 4 on the valve body 1 connects the outlet end of the grouting pump and the grouting pipe, and is the main channel for medium flow. The left end of the first branch channel 5 is connected to the main channel 4. When the outlet pressure of the grouting pump is normal, the sealing piston 2 is located between the inlet end of the automatic pressure relief channel 7 and the first branch channel 5, sealing the automatic pressure relief channel 7 and preventing the medium from flowing into the automatic pressure relief channel 7. Once the grouting pump experiences an abnormal pressure increase, the pressure in the main channel 4 increases, generating sufficient thrust on the sealing piston 2, causing it to overcome the resistance and slide away from the main channel 4. The inlet end of the automatic pressure relief channel 7 is opened, and the high-pressure medium in the main channel 4 flows to the outside through the first branch channel 5 and the automatic pressure relief channel 7, thereby reducing the pressure in the system and playing the role of automatic pressure relief, avoiding safety accidents caused by excessive pressure. The sealing piston 2 is in close contact with the main channel 4, and the grout in the main channel 4 is in a flowing state, which can reduce the risk of valve assembly blockage failure.

[0041] The lower end of the second diversion channel 6 connects to the main channel 4. The valve core 3 is spherical, and there is line contact between the valve core 3 and the second diversion channel 6, making it less likely for particles to get stuck at the seal. It also allows for automatic self-alignment, ensuring a good seal. During normal operation, the valve core 3 is in close contact with the outlet end (i.e., the upper end) of the second diversion channel 6, preventing the medium from entering the manual pressure relief channel 8. When manual pressure relief is required, such as after pump shutdown for maintenance or grouting, the valve core 3 is moved or rotated away from the main channel 4 (i.e., upwards) and separated from the outlet end of the second diversion channel 6, connecting the second diversion channel 6 to the manual pressure relief channel 8. In this way, the medium in the main channel 4 can be discharged through the second diversion channel 6 and the manual pressure relief channel 8, achieving manual pressure relief. This ensures that the pressure buildup in the pipeline from the pump end to the wellhead valve and inside the pump is released before pump shutdown for maintenance or pipeline removal, ensuring construction safety.

[0042] This disclosure integrates manual and automatic pressure relief into a single valve body 1, reducing installation steps and space requirements. Construction personnel no longer need to install two separate valves, saving installation time and labor costs. It also allows for a more compact and rational layout around the grouting pump, improving space utilization at the construction site.

[0043] The dual guarantee mechanism of automatic and manual pressure relief greatly improves the reliability of the grouting system. Manual pressure relief only requires the operator to apply external force to the valve core 3; the operation is simple and easy to understand, requiring no complex operating skills or specialized tools. This convenient operation not only reduces the difficulty and labor intensity of the operator's work but also reduces safety risks caused by operational errors, making the construction process smoother and more efficient, suitable for various coal mine goaf remediation construction scenarios.

[0044] In some examples, a valve assembly for a grouting pump also includes a pressure relief valve stem 9, which is detachably connected to the valve body 1. The inner end of the pressure relief valve stem 9 abuts against the valve core 3 and seals the valve core 3 against the second diversion channel 6. The outer end of the pressure relief valve stem 9 is located outside the valve body 1. After the pressure relief valve stem 9 moves or rotates under external force, the valve core 3 separates from the second diversion channel 6 under the pressure in the main flow channel 4, so as to connect the manual pressure relief channel 8 with the second diversion channel 6.

[0045] For example, such as Figure 1 and Figure 2As shown, the operator can operate the pressure relief valve stem 9 to rotate or move it axially. When manual pressure relief is required, the pressure relief valve stem 9 is moved outward from the valve body 1 by operating it. Under the pressure in the main flow channel 4, the valve core 3 also moves outward from the valve body 1, separating from the outlet end of the second diversion channel 6. The medium in the main flow channel 4 can then be discharged through the second diversion channel 6 and the manual pressure relief channel 8. After pressure relief is completed, the pressure relief valve stem 9 is rotated or moved in the opposite direction to re-seal the valve core 3 against the outlet end of the second diversion channel 6, making manual pressure relief operation more convenient. The pressure relief valve stem 9 is used to press the valve core 3 tightly against the outlet end of the second diversion channel 6. During manual pressure relief, the valve core 3 can rotate freely, so the contact surface between the valve core 3 and the second diversion channel 6 is not unique, which can extend the service life of the valve core 3.

[0046] Taking the vertical setting of the pressure relief valve stem 9 as an example, the upper end of the pressure relief valve stem 9 and the valve body 1 can be locked together by a locking device (such as a bolt). When pressure relief is required, the locking device can be removed, the pressure relief valve stem 9 can be moved upward, and after pressure relief is completed, the pressure relief valve stem 9 can be moved downward to return to the initial position. Then, the upper end of the pressure relief valve stem 9 can be locked together with the valve body 1 by the locking device.

[0047] Alternatively, the pressure relief valve stem 9 can be threadedly connected to the valve body 1 above the manual pressure relief channel 8. In this way, when pressure relief is needed, the pressure relief valve stem 9 can be rotated to move it upward. After pressure relief is completed, the pressure relief valve stem 9 can be rotated in the opposite direction to move it downward back to the initial position. When the pressure relief valve stem 9 is not rotated, it can stay in the desired position, making the operation simpler and more convenient.

[0048] In some examples, a valve assembly for a grouting pump also includes a handle 10, which is connected to the outer end of a pressure relief valve stem 9.

[0049] For example, such as Figure 1 and Figure 2 As shown, the handle 10 is vertically connected to the outer end of the pressure relief valve stem 9. When the operator holds the handle 10, he can more easily and conveniently apply force to the pressure relief valve stem 9 to realize the movement of the valve core 3.

[0050] In some examples, a valve assembly for a grouting pump also includes a dredging top 11 and a limiting platform 12. The dredging top 11 is inserted into the valve body 1 and forms a sliding fit. The dredging top 11 is perpendicular to the main channel 4. The inner end of the dredging top 11 is located inside the main channel 4, and the outer end of the dredging top 11 is located outside the valve body 1. The limiting platform 12 is disposed around the dredging top 11 and is located inside the main channel 4. After the dredging top 11 slides, the limiting platform 12 is used to contact or separate from the inner wall of the valve body 1.

[0051] For example, such as Figure 1As shown, taking the unblocking top piece 11 located below the valve body 1 as an example, the limiting platform 12 is located around the unblocking top piece 11. When not in use, the lower end face of the limiting platform 12 contacts the inner wall of the valve body 1 to limit movement, allowing the inner end of the unblocking top piece 11 to remain within the main flow channel 4. When the second branch channel 6 becomes blocked, the operator can hammer the outer end (i.e., the lower end) of the unblocking top piece 11 to make it move back and forth axially, breaking up the solidified cement and opening the valve assembly passage for manual pressure relief. This facilitates unblocking the internal flow channels of the valve assembly, promptly resolves blockages, and ensures the stability and reliability of the manual pressure relief valve.

[0052] In some examples, the unblocking top piece 11 is coaxially arranged with the second diversion channel 6, and the inner end of the unblocking top piece 11 extends into the second diversion channel 6.

[0053] For example, such as Figure 1 As shown, the unblocking top piece 11 extends into the second diversion channel 6, giving the unblocking top piece 11 a sufficiently large range of motion to accurately unblock the second diversion channel 6, making the unblocking operation more precise and efficient, and quickly solving the problem of poor manual pressure relief caused by blockage of the second diversion channel 6.

[0054] In some examples, the portion of the top member 11 located on the side of the limiting platform 12 facing the second diversion channel 6 is tapered, and its diameter decreases linearly from one end near the limiting platform 12 to the other end.

[0055] For example, such as Figure 1 As shown, the conical design of the unblocking top piece 11 makes it easier to insert into the blockage when pushed into the second diversion channel 6. As it advances, the conical portion gradually expands the compression range against the blockage, facilitating the breaking or displacement of the blockage to achieve the purpose of unblocking. Simultaneously, this design reduces the resistance during the advancement of the unblocking top piece 11, making the unblocking operation smoother, improving unblocking efficiency, and reducing the difficulty of unblocking. The sealing point between the valve core 3 and the second diversion channel 6 is close to the main channel 4, and the unblocking top piece 11 is installed there, which reduces the risk of valve assembly blockage failure. The limiting platform 12 and the unblocking top piece 11 are an integral structure, making the connection more robust and reliable.

[0056] In some examples, valve body 1 includes main valve block 1-1 and automatic pressure relief valve block 1-2. Main flow channel 4, first branch flow channel 5, second branch flow channel 6 and automatic pressure relief channel 7 are all located on main valve block 1-1. First branch flow channel 5 is located outside main flow channel 4, and automatic pressure relief channel 7 is located outside first branch flow channel 5. Automatic pressure relief valve block 1-2 is disposed on main valve block 1-1 and is located outside the end of first branch flow channel 5 away from main flow channel 4. Automatic pressure relief valve block 1-2 has valve cavity 13, which communicates with first branch flow channel 5. After sealing piston 2 slides into valve cavity 13, it is used to communicate automatic pressure relief channel 7 with first branch flow channel 5.

[0057] For example, such as Figure 1 and Figure 3 As shown, taking the main channel 4 horizontally arranged in the front-to-back direction and the first branch channel 5 located to the right of the main channel 4 as an example, the main channel 4 is the main channel through which the medium flows from the grouting pump to the grouting pipe. The first branch channel 5 is located outside the main channel 4 and is connected to it. The automatic pressure relief channel 7 is also located outside the first branch channel 5 and is connected to the outside. This layered structural layout gives the flow of the medium between different channels a clear path and direction. The automatic pressure relief valve block 1-2 is installed on the main valve block 1-1 and is located outside the right end of the first branch channel 5. The valve chamber 13 on the automatic pressure relief valve block 1-2 is connected to the first branch channel 5.

[0058] When the grouting pump is working normally, the sealing piston 2 is located between the inlet end of the automatic pressure relief channel 7 and the first diversion channel 5, sealing the automatic pressure relief channel 7 and preventing the medium from flowing in. Once the grouting pump experiences an abnormal pressure increase, the pressure in the main channel 4 increases, generating sufficient thrust on the sealing piston 2, causing it to overcome resistance and slide away from the main channel 4, entering the valve chamber 13. At this time, the inlet end of the automatic pressure relief channel 7 is opened, and the high-pressure medium in the main channel 4 flows to the outside through the first diversion channel 5 and the automatic pressure relief channel 7 in sequence, thereby reducing the pressure in the system. The structure of the automatic pressure relief part is reasonably arranged on the main valve block 1-1 and the automatic pressure relief valve block 1-2, making the entire automatic pressure relief part compact, reducing the installation space requirement, and improving the space utilization rate of the construction site. The automatic pressure relief valve block 1-2 and the main valve block 1-1 are detachably connected, for example by bolts, facilitating the disassembly and maintenance of the sealing piston 2.

[0059] In some examples, the second diversion channel 6 is located on the main valve block 1-1 and outside the main flow channel 4. The valve body 1 also includes a manual pressure relief valve block 1-3, which is disposed on the main valve block 1-1 and located on the outer side of the second diversion channel 6 away from the main flow channel 4. The manual pressure relief channel 8 is located on the manual pressure relief valve block 1-3 and on the side of the valve core 3 away from the main flow channel 4. After the valve core 3 moves or rotates into the manual pressure relief channel 8 under the action of external force, it is used to connect the manual pressure relief channel 8 with the second diversion channel 6.

[0060] For example, such as Figure 1 and Figure 3As shown, the second diversion channel 6 is located above the main valve block 1-1 and above the main flow channel 4, with its lower end connected to the main flow channel 4. The manual pressure relief valve block 1-3 is mounted on the main valve block 1-1 and located outside the upper end of the second diversion channel 6. The manual pressure relief channel 8 on the manual pressure relief valve block 1-3 is connected to the outside. Under normal operating conditions, the valve core 3 is in close contact with the outlet end of the second diversion channel 6, preventing the medium from entering the manual pressure relief channel 8. When manual pressure relief is required, such as after pump shutdown for maintenance or grouting, the operator applies external force to the valve core 3, causing it to move or rotate away from the main flow channel 4 and enter the manual pressure relief channel 8. At this time, the second diversion channel 6 connects with the manual pressure relief channel 8, allowing the medium in the main flow channel 4 to be discharged through the second diversion channel 6 and the manual pressure relief channel 8, thus achieving manual pressure relief. The manual pressure relief section is rationally arranged on the main valve block 1-1 and the manual pressure relief valve block 1-3, making the entire manual pressure relief section compact, reducing installation space requirements and improving the space utilization of the construction site. The manual pressure relief valve block 1-3 is detachably connected to the main valve block 1-1, for example, by bolts, which facilitates the disassembly and maintenance of the valve core 3.

[0061] In some examples, a valve assembly for a grouting pump also includes a protective cover 14, a shear plate 15, a safety pin 16, and a piston rod 17. The protective cover 14 is disposed on an automatic pressure relief valve block 1-2 and located at the end of the automatic pressure relief valve block 1-2 away from the main flow channel 4. The shear plate 15 is located inside the protective cover 14, with one end of the shear plate 15 hinged to the automatic pressure relief valve block 1-2 and the hinge axis being the same as the axial direction of the main flow channel 4. The other end of the shear plate 15 is a free end. The safety pin 16 is inserted into both the middle of the shear plate 15 and the automatic pressure relief valve block 1-2. One end of the piston rod 17 is connected to a sealing piston 2, and the other end of the piston rod 17 abuts against the shear plate 15. After the sealing piston 2 and the piston rod 17 slide toward the protective cover 14, the safety pin 16 is sheared off, and the free end of the shear plate 15 flips away from the piston rod 17.

[0062] For example, such as Figure 1 and Figure 3As shown, the automatic pressure relief valve block 1-2 is open at the left end and closed at the right end. The protective cover 14 is installed on the outside of the right end of the automatic pressure relief valve block 1-2, which provides positioning protection for the shear plate 15, safety pin 16, and piston rod 17, preventing interference from external impurities. The upper end of the shear plate 15 is hinged to the automatic pressure relief valve block 1-2, and the lower end is free. The safety pin 16 is inserted into the automatic pressure relief valve block 1-2 and the shear plate 15, fixing the shear plate 15 inside the protective cover 14. The piston rod 17 keeps the sealing piston 2 in the normal position. When the pressure in the main flow channel 4 is normal, the safety pin 16 maintains the stability of each component. Once the pressure rises abnormally, the thrust on the sealing piston 3 is transmitted to the shear plate 15 through the piston rod 17. When the thrust exceeds the bearing limit of the safety pin 16, the safety pin 16 is sheared, the free end of the shear plate 15 flips away from the piston rod 17, the piston rod 17 loses its constraint, and the sealing piston 2 slides into the valve chamber 13 under pressure, realizing automatic pressure relief. This increases the reliability and stability of automatic pressure relief and prevents accidental triggering of the automatic pressure relief function. The safety pin 16, as a controllable weak point, only activates when the pressure abnormally reaches the set value, ensuring stable system operation under normal working conditions. The protective cover 14 prevents the sheared safety pin 16 from flying out and injuring people, and also prevents external factors from damaging critical internal components, extending the service life of the valve assembly and improving system safety.

[0063] In some examples, a valve assembly for a grouting pump also includes a buffer pad 18 disposed within a valve chamber 13 and located at the end of the valve chamber 13 away from the main flow channel 4, with the piston rod 17 inserted into the buffer pad 18 to form a sliding fit.

[0064] For example, such as Figure 1 and Figure 3 As shown, when the sealing piston 2 slides rapidly into the valve chamber 13 under pressure, the piston rod 17 moves together with the sealing piston 2. The buffer pad 18 has a certain elasticity, and its own deformation can reduce the impact force of the sealing piston 2, avoiding a rigid collision between the sealing piston 2 and the bottom of the valve chamber 13. This reduces wear on the sealing piston 2 and the valve chamber 13, extending their service life. It also seals the mating surfaces of the piston rod 17 and the automatic pressure relief valve block 1-2.

[0065] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure 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 this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A valve group assembly for a grout pump for communicating between an outlet end of the grout pump and a grout pipe, characterised in that, The valve group assembly for the grouting pump comprises: a valve body (1) having a main flow channel (4), a first branch flow channel (5), a second branch flow channel (6), an automatic pressure relief channel (7) and a manual pressure relief channel (8), one end of the main flow channel (4) being used for communicating with an outlet end of the grouting pump, the other end of the main flow channel (4) being used for communicating with a grouting pipe, the first branch flow channel (5) and the second branch flow channel (6) both communicating with the main flow channel (4); a sealing piston (2) being slidingly arranged between the first branch flow channel (5) and the automatic pressure relief channel (7), the sealing piston (2) being used for making the automatic pressure relief channel (7) communicate with or disconnect from the first branch flow channel (5) after sliding; a valve core (3) being movably or rotatably arranged between the second branch flow channel (6) and the manual pressure relief channel (8), the valve core (3) being used for making the manual pressure relief channel (8) communicate with or disconnect from the second branch flow channel (6) after moving or rotating.

2. A valve group assembly for a grout pump according to claim 1, characterized in that The valve group assembly for the grouting pump further comprises a pressure relief valve rod (9) being detachably connected with the valve body (1), an inner end of the pressure relief valve rod (9) abutting against the valve core (3) and making the valve core (3) contact and seal with the second branch flow channel (6), an outer end of the pressure relief valve rod (9) being located outside the valve body (1), the valve core (3) being separated from the second branch flow channel (6) under the pressure in the main flow channel (4) after the pressure relief valve rod (9) moves or rotates under external force, and the manual pressure relief channel (8) being made to communicate with the second branch flow channel (6).

3. A valve group assembly for a grout pump according to claim 2, wherein, The valve group assembly for the grouting pump further comprises a handle (10) being connected with the outer end of the pressure relief valve rod (9).

4. A valve group assembly for a grout pump according to claim 1, wherein The valve group assembly for the grouting pump further comprises: a dredging top piece (11) being inserted into the valve body (1) and forming a sliding fit, the dredging top piece (11) being perpendicularly arranged with the main flow channel (4), an inner end of the dredging top piece (11) being located in the main flow channel (4), and an outer end of the dredging top piece (11) being located outside the valve body (1); a limiting table (12) being arranged at the periphery of the dredging top piece (11) and located in the main flow channel (4), the limiting table (12) being used for contacting or separating from the inner wall of the valve body (1) after the dredging top piece (11) slides.

5. A valve group assembly for a grout pump according to claim 4, wherein, The dredging top piece (11) is coaxially arranged with the second branch flow channel (6), and the inner end of the dredging top piece (11) extends into the second branch flow channel (6).

6. A valve group assembly for a grout pump according to claim 4, wherein The part of the dredging top piece (11) located on the side of the limiting table (12) towards the second branch flow channel (6) is conical, and the diameter thereof linearly decreases from one end close to the limiting table (12) to the other end.

7. A valve group assembly for a grout pump according to claim 1, wherein The valve body (1) comprises: The main valve block (1-1), the main flow channel (4), the first branch flow channel (5), the second branch flow channel (6) and the automatic pressure relief channel (7) are all located on the main valve block (1-1), the first branch flow channel (5) is located on the periphery of the main flow channel (4), and the automatic pressure relief channel (7) is located on the periphery of the first branch flow channel (5); The automatic pressure relief valve block (1-2) is arranged on the main valve block (1-1) and located on the outer side of the first branch flow channel (5) away from the main flow channel (4), the automatic pressure relief valve block (1-2) has a valve cavity (13), the valve cavity (13) is communicated with the first branch flow channel (5), and the sealing piston (2) is slid into the valve cavity (13) to communicate the automatic pressure relief channel (7) with the first branch flow channel (5).

8. A valve group assembly for a grout pump according to claim 7, wherein, The second branch flow channel (6) is located on the main valve block (1-1) and located on the periphery of the main flow channel (4), the valve body (1) further comprises a manual pressure relief valve block (1-3), the manual pressure relief valve block (1-3) is arranged on the main valve block (1-1) and located on the outer side of the second branch flow channel (6) away from the main flow channel (4), the manual pressure relief channel (8) is located on the manual pressure relief valve block (1-3) and located on the side of the valve core (3) away from the main flow channel (4), and the valve core (3) is moved or rotated into the manual pressure relief channel (8) under the action of external force to communicate the manual pressure relief channel (8) with the second branch flow channel (6).

9. A valve group assembly for a grout pump according to claim 7, wherein, The valve assembly for the grouting pump further comprises: The protective cover (14) is arranged on the automatic pressure relief valve block (1-2) and located on the end of the automatic pressure relief valve block (1-2) away from the main flow channel (4); The shearing plate (15) is located in the protective cover (14), one end of the shearing plate (15) is hinged to the automatic pressure relief valve block (1-2), the hinge shaft is the same as the axial direction of the main flow channel (4), and the other end of the shearing plate (15) is a free end; The safety pin (16) is inserted into the middle part of the shearing plate (15) and the automatic pressure relief valve block (1-2) at the same time; One end of the piston rod (17) is connected with the sealing piston (2), the other end of the piston rod (17) abuts against the shearing plate (15), and the sealing piston (2) and the piston rod (17) slide towards the protective cover (14) to shear the safety pin (16) and make the free end of the shearing plate (15) flip away from the piston rod (17).

10. A valve group assembly for a grout pump according to claim 9, wherein, The valve assembly for the grouting pump further comprises a buffer pad (18), the buffer pad (18) is arranged in the valve cavity (13) and located on the end of the valve cavity (13) away from the main flow channel (4), and the piston rod (17) is inserted into the buffer pad (18) and forms a sliding fit.

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