Descaling device high-pressure pump valve with multiple sections of guide sleeves

Abstract

The invention discloses a descaling device high-pressure pump valve with multiple sections of guide sleeves, which consists of a driving device, a push rod device, a valve core structure and a sectional guide component, and is characterized in that a plurality of guide sleeves are sleeved on a push rod section by section, and the space between adjacent guide sleeves is filled by a guide spring, an elastic cushion or a ball to form a multi-stage sealing and dynamic compensation structure. The driving device is connected with the push rod through the buffer spring and can absorb impact load of reciprocating motion; a backflow channel and a pressure balance valve plate are arranged in the push rod device shell, and overpressure automatic drainage protection is achieved. The valve element structure adopts the conical valve element to be matched with the flaring valve seat, so that the sealing response efficiency is improved. Radial shaking of the push rod is inhibited through cooperation of the multiple sections of guide sleeves, the sealing performance and the guide stability are remarkably improved, and the risks of liquid leakage and eccentric wear are reduced. The buffer structure and the pressure adjusting system can disperse lateral load, inhibit vibration transmission, prolong the service life of key components, and are suitable for stable operation under high-pressure and high-frequency working conditions.

Description

Technical Field

[0001] The invention belongs to the technical field of steel descaling devices and relates to a high-pressure pump valve of a descaling device with a multi-section guide sleeve. Background Art

[0002] In industries such as steel and metallurgy, high-pressure pumps and valves are core components of descaling systems. Their function is to deliver and control high-pressure liquid media through the reciprocating motion of a push rod. Currently, conventional high-pressure pump and valve structures often use a single guide sleeve or a simple guide structure to support and seal the push rod. However, under high-pressure conditions, the push rod is subjected to long-term high-frequency reciprocating motion and the impact loads of the liquid medium. A single guide sleeve cannot effectively suppress radial vibration of the push rod, resulting in a gradual increase in the clearance between the push rod and the push rod assembly housing. This in turn leads to the following problems: First, sealing performance is reduced, allowing liquid media to leak through the gap, reducing system pressure stability; second, insufficient guiding accuracy means that off-axis movement of the push rod increases friction and wear against the inner wall of the housing, shortening the life of key components; third, vibration of the push rod during dynamic operation can induce system resonance, affecting equipment reliability. Furthermore, existing guide structures lack a segmented buffer design, making it difficult to balance lateral loads, further increasing the risk of seal failure and guide deviation. Therefore, developing a high-pressure pump and valve with a multi-segment guide sleeve structure to improve push rod guiding stability and sealing durability has become an urgent technical problem to be solved. Summary of the Invention

[0003] The purpose of the present invention is to solve the problems in the background technology and to provide a high-pressure pump valve of a descaling device with a multi-section guide sleeve.

[0004] In order to achieve the above technical objectives, the technical solution adopted by the present invention is: A high-pressure pump valve with a descaling device having a multi-section guide sleeve comprises a driving device, a push rod device, a push rod device housing, a pump housing, a valve core structure, a liquid inlet pipe and a liquid outlet pipe. The push rod device comprises a push rod, a pushing chamber is provided in the push rod device housing, the push rod is placed in the pushing chamber, the rear end of the push rod device housing is connected to the pump housing, the valve core structure is installed in the pump housing, the liquid inlet pipe and the liquid outlet pipe are respectively connected to the front and rear ends of the valve core structure, the driving device is connected to the front end of the push rod, the driving device can push the push rod to move back and forth, the front end of the push rod extends to the front end of the valve core structure, the push rod is used to push the liquid medium in the liquid inlet pipe to the liquid outlet pipe through the valve core structure, and is characterized in that: a plurality of guide sleeves are sleeved on the push rod, the inner side surface of the guide sleeve is sealed with the push rod, the outer side surface of the guide sleeve is sealed with the push rod device housing, the gaps between adjacent guide sleeves are matched, and the gaps between adjacent guide sleeves are filled by guide springs or elastic pads or balls.

[0005] To optimize the above technical solutions, specific measures taken also include: The above-mentioned driving device includes a driving rod and a driving seat. One end of the driving rod is connected to an external eccentric wheel structure, and the eccentric wheel structure can drive the driving rod to move back and forth. The other end of the driving rod is connected to the driving seat, and the driving seat is connected to the front end of the push rod.

[0006] The above-mentioned driving seat is connected to the front end of the push rod through a buffer. The buffer includes a buffer seat, a buffer spring and a locking bolt. The buffer seat is provided with a cavity that passes through the front and back. The front end of the push rod passes through the cavity of the buffer seat. The front end of the push rod is also provided with a protruding push rod end. One end of the buffer spring is in contact with the cavity of the buffer seat, and the other end is in contact with the push rod end. The buffer seat is fixedly connected to the driving seat through a locking bolt.

[0007] The push rod is covered with four guide sleeves. The structures arranged between the push rod and the push rod device housing are as follows from front to back: guide sleeve, elastic pad, guide sleeve, ball, guide sleeve, guide spring and guide sleeve.

[0008] The above-mentioned push rod device shell is provided with a reflux channel connected to the outside world, and a reflux chamber is provided between the rear end of the push rod and the push rod device shell. The reflux chamber is connected to the reflux channel, and the reflux chamber is connected to the liquid inlet pipe. A valve plate and a tension spring are provided in the reflux chamber. One end of the tension spring is fixedly connected to the front end of the valve core structure, and the other end is connected to the valve plate. The tension spring pulls the valve plate to block the connection between the reflux chamber and the reflux channel. When the liquid inlet pressure in the liquid inlet pipe is greater than the tension of the tension spring, the liquid inlet pressure can push open the valve plate, so that the reflux chamber is connected to the reflux channel.

[0009] The above-mentioned valve core structure includes a valve seat, a drain valve core, and a drain spring. The valve seat divides the internal space of the pump housing into a pre-valve liquid chamber and a post-valve liquid chamber. The pre-valve liquid chamber is connected to the liquid inlet pipe, and the post-valve liquid chamber is connected to the liquid outlet pipe. A valve seat hole is provided on the valve seat, which passes through the front and back parts. The valve seat hole connects the pre-valve liquid chamber and the post-valve liquid chamber. The drain valve core and the drain spring are both installed in the post-valve liquid chamber. One end of the drain spring is fixedly connected to the wall of the post-valve liquid chamber, and the other end is fixedly connected to the drain valve core. The drain spring pushes the drain valve core to the rear end of the valve seat hole, so that the drain valve core closes the valve seat hole. When the inlet pressure in the liquid inlet pipe is greater than the thrust of the drain spring, the inlet pressure can push open the drain valve core, so that the valve seat hole is connected to the liquid outlet pipe.

[0010] The rear end of the valve seat hole is a flared structure, and the front end of the corresponding discharge valve core is a pointed structure, and the shape of the pointed structure matches the shape of the flared structure.

[0011] The outer side of the drain valve core is covered with a drain valve sleeve, which is fixed in the rear liquid cavity of the valve. The drain valve core can slide back and forth in the drain valve sleeve.

[0012] The drain valve sleeve is provided with a valve sleeve hole, which passes through the inner side and the outer side of the drain valve sleeve.

[0013] The guide sleeve is made of rubber material.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention forms a multi-stage guide structure through the synergistic effect of multiple guide sleeves provided in sections on the push rod and the elastic elements (guide springs, elastic pads, and balls 83). This structure can not only suppress radial shaking of the push rod, but also dynamically compensate for the fit clearance between the push rod and the housing through the elastic elements. This design significantly improves the axial centering of the push rod movement and reduces the risk of eccentric wear. At the same time, the layered pressure bearing of the multiple sealing surfaces enhances the sealing reliability under high-pressure conditions and avoids pressure fluctuations caused by liquid leakage.

[0015] 2. The elastic support structure (such as a guide spring or ball bearing) between adjacent guide sleeves in this invention evenly distributes the lateral load generated by the reciprocating motion of the push rod, reducing local stress concentration and extending the service life of the guide sleeve and push rod. Furthermore, the linkage design of the buffer and multi-segment guide sleeve in the drive mechanism further absorbs high-frequency impact energy, effectively suppressing the transmission of push rod vibration to the pump and valve body, avoiding system resonance, and improving the operational stability and durability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a high-pressure pump valve of a descaling device with a multi-section guide sleeve of the present invention; Figure 2 It is a structural diagram of the driving device; Figure 3 1. It is a schematic structural diagram of a push rod device and a push rod device housing; Figure 4 It is a structural diagram of the valve core structure; The accompanying drawings are marked as: drive device 1, drive rod 11, drive seat 12, buffer seat 13, buffer spring 14, locking bolt 15, push rod device 2, push rod 21, push rod end 22, push rod device housing 3, reflux channel 31, reflux chamber 32, tension spring 33, pump housing 4, pre-valve liquid chamber 41, post-valve liquid chamber 42, valve core structure 5, valve seat 51, drain valve core 52, drain spring 53, valve seat hole 54, drain valve sleeve 55, valve sleeve hole 56, liquid inlet pipe 6, liquid outlet pipe 7, guide sleeve 8, guide spring 81, elastic pad 82, ball 83. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is described and illustrated below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely used to explain this application and are not intended to limit this application. Based on the embodiments provided in this application, all other embodiments obtained by those of ordinary skill in the art without making any creative efforts are within the scope of protection of this application.

[0018] Obviously, the drawings described below are merely examples or embodiments of the present application. Those skilled in the art can, without inventive effort, apply the present application to other similar scenarios based on these drawings. Furthermore, it is also understood that, although the effort involved in such a development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, changes in design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as an insufficiency of the content disclosed in this application.

[0019] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments unless there is a conflict.

[0020] Unless otherwise defined, the technical or scientific terms used in this application should have the ordinary meaning understood by a person of ordinary skill in the technical field to which this application belongs. The words "a", "an", "a", "the" and the like used in this application do not indicate a limit on quantity and may indicate the singular or plural. The terms "include", "comprise", "have" and any variations thereof used in this application are intended to cover non-exclusive inclusions; for example, a process, method, system, product or device that includes a series of steps or units (units) is not limited to the listed steps or units, but may also include steps or units that are not listed, or may also include other steps or units that are inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like used in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The words "multiple" / "several" used in this application refer to two or more. "And / or" describes the association relationship between associated objects, indicating that three relationships can exist. For example, "A and / or B" can mean: A exists alone, A and B exist at the same time, or B exists alone. The character " / " generally indicates that the objects before and after are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific order for the objects.

[0021] like Figure 1As shown, the main structure of the high-pressure pump valve of the descaling device with a multi-section guide sleeve of the present invention includes a driving device 1, a push rod device 2, a push rod device housing 3, a pump housing 4, a valve core structure 5, a liquid inlet pipe 6 and a liquid outlet pipe 7. The driving device 1 drives the valve core structure 5 to move through the push rod device 2, thereby realizing the transportation of high-pressure liquid medium from the liquid inlet pipe 6 to the liquid outlet pipe 7. The push rod device housing 3 is connected to the pump housing 4 front and back, the valve core structure 5 is located inside the pump housing 4, and the liquid inlet pipe 6 and the liquid outlet pipe 7 are connected to the front and rear ends of the valve core structure 5 respectively. The push rod 21 of the push rod device 2 passes through the push rod device housing 3 and the pump housing 4, its front end is connected to the driving device 1, and its rear end extends to the front end of the valve core structure 5, which is used to transmit driving force and control the flow of liquid medium.

[0022] Drive device 1, such as Figure 2 As shown: the driving device 1 includes a driving rod 11, a driving seat 12 and a buffer assembly. One end of the driving rod 11 is hinged to an external eccentric wheel mechanism (not shown in the figure). When the eccentric wheel rotates, it drives the driving rod 11 to reciprocate back and forth; the other end of the driving rod 11 is fixedly connected to the driving seat 12 through a thread. The driving seat 12 is connected to the front end of the push rod 21 through the buffer. The buffer includes a buffer seat 13, a buffer spring 14 and a locking bolt 15. The specific structure is as follows: The buffer seat 13: is a hollow cylinder with a cavity that passes through the front and back. The front end of the push rod 21 passes through the cavity and is limited by the push rod end 22; the buffer spring 14: is mounted on the front end of the push rod 21, one end of which abuts the inner wall of the front end of the cavity of the buffer seat 13, and the other end abuts the push rod end 22; the locking bolt 15: passes through the side walls of the driving seat 12 and the buffer seat 13, and is fixed by thread locking. The buffer spring 14 can absorb the impact load transmitted by the driving rod 11, reduce the instantaneous vibration of the push rod 21, and avoid structural fatigue caused by rigid impact.

[0023] Push rod device 2, push rod device housing 3, such as Figure 3As shown, a cylindrical push chamber is defined within the push rod assembly housing 3, housing a push rod 21. The rear end of the push rod assembly housing 3 is sealed to the pump housing 4 via a flange, while the front end includes an opening for mounting the drive assembly 1. Four guide sleeves 8 are positioned around the push rod 21, spaced axially along the push rod 21. Adjacent guide sleeves 8 are filled with elastic elements to form a segmented guiding and sealing structure, which is specifically configured as follows: first guide sleeve 8: located at the front end of the push rod 21, adjacent to the drive device 1, its outer diameter has an interference fit with the inner wall of the push rod device housing 3, and its inner diameter has a clearance fit with the push rod 21 (clearance ≤ 0.05mm); second guide sleeve 8 and elastic pad 82: an elastic pad 82 is provided on the rear side of the second guide sleeve 8. The elastic pad 82 is made of polyurethane material with a thickness of 2mm. It can deform when under pressure to compensate for the radial deviation of the push rod 21; third guide sleeve 8 and ball 83: a circle of balls 83 is provided on the rear side of the third guide sleeve 8. The balls 83 have a diameter of 1.5mm and are evenly embedded in the annular groove on the outer wall of the guide sleeve 8, which can reduce the friction resistance of the push rod 21 during movement; fourth guide sleeve 8 and guide spring 81: a spiral guide spring 81 is provided on the rear side of the fourth guide sleeve 8. The outer diameter of the spring 81 contacts the inner wall of the push rod device housing 3, and the inner diameter has a clearance fit with the outer wall of the push rod 21, which is used to dynamically adjust the axial position of the push rod 21. The multi-segment guide sleeve 8 suppresses radial shaking of the push rod 21 through layered buffering of elastic elements, and at the same time achieves multi-level sealing to prevent leakage of high-pressure liquid.

[0024] The push rod assembly housing 3 is provided with a reflux channel 31 that communicates with the outside world. A reflux chamber 32 is formed between the rear end of the push rod 21 and the housing 3. This reflux chamber 32 is connected to the liquid inlet pipe 6 via a pipeline. A valve disc and a tension spring 33 are located within reflux chamber 32. The valve disc is a circular stainless steel sheet with a diameter slightly larger than the outlet of reflux channel 31. One end of the tension spring 33 is fixed to the front end of the valve core structure 5, and the other end is connected to the valve disc. Under normal conditions, the spring tension causes the valve disc to block the outlet of reflux channel 31.

[0025] Working principle: When the pressure in the liquid inlet pipe 6 exceeds the set value of the tension spring 33, the liquid pressure pushes open the valve plate, and part of the medium returns to the liquid inlet end through the reflux channel 31, realizing automatic regulation of the system pressure and avoiding damage to the sealing structure due to overpressure.

[0026] Valve core structure 5, such as Figure 4As shown, the core of the valve core structure 5 is the valve seat 51, which divides the interior of the pump housing 4 into a pre-valve liquid chamber 41 and a post-valve liquid chamber 42. A valve seat hole 54 is provided in the center of the valve seat 51, extending from front to back. The pre-valve liquid chamber 41 is connected to the liquid inlet pipe 6, and the post-valve liquid chamber 42 is connected to the liquid outlet pipe 7. The drain valve core 52 and the drain spring 53 are installed in the rear liquid chamber 42 of the valve. The front end of the drain valve core 52 is a conical pointed structure, which fits with the expanded structure of the rear end of the valve seat hole 54. Under normal circumstances, the elastic force of the drain spring 53 presses the drain valve core 52 against the rear end of the valve seat hole 54 to close the liquid channel; one end of the drain spring 53 is fixed to the inner side of the end cover of the rear liquid chamber 42 of the valve, and the other end is connected to the drain valve core 52, and its pre-tightening force can be adjusted according to the system pressure; the drain valve sleeve 55 is sleeved on the outside of the drain valve core 52 and fixed to the inner wall of the rear liquid chamber 42 of the valve by screws. The side wall of the drain valve sleeve 55 is provided with multiple valve sleeve holes 56, which are used to balance the internal and external pressures when the valve core moves.

[0027] Working principle: When the pressure in the liquid inlet pipe 6 rises to a level sufficient to overcome the thrust of the discharge spring 53, the liquid pushes open the discharge valve core 52 and flows into the liquid outlet pipe 7 through the valve seat hole 54 and the valve sleeve hole 56.

[0028] The guide sleeve 8 is made of wear-resistant rubber (such as nitrile rubber) and is surface vulcanized to enhance sealing and pressure resistance; the push rod 21 is made of high-strength stainless steel (such as 17-4PH) and is hard chrome-plated on the surface to reduce the friction coefficient; the elastic pad 82 is made of polyurethane material with a Shore hardness of 80A and is oil-resistant and corrosion-resistant; the ball 83 is made of ceramic with a diameter tolerance of ±0.01mm to reduce friction loss.

[0029] The workflow of the present invention is as follows: Driving stage: The eccentric wheel drives the driving rod 11 forward, and the driving seat 12 pushes the push rod 21 forward through the buffer spring 14. The front end of the push rod 21 pushes open the discharge valve core 52, and the high-pressure liquid in the liquid inlet pipe 6 enters the liquid outlet pipe 7 through the valve seat hole 54; Return stage: When the eccentric wheel is reset, the driving rod 11 is pulled back, and the push rod 21 retreats under the action of the discharge spring 53, and the discharge valve core 52 recloses the valve seat hole 54. At the same time, the liquid in the liquid inlet pipe 6 is replenished to the push chamber through the reflux chamber 32; Pressure regulation: If the system pressure rises abnormally, the valve disc in the reflux chamber 32 is pushed open, and the liquid is depressurized through the reflux channel 31 to protect the sealing structure.

[0030] The above embodiments are preferred implementations of the present invention, but the implementation of the present invention is not limited to the embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A descaling device high-pressure pump valve with a multi-section guide sleeve, comprising a drive device (1), a push rod device (2), a push rod device housing (3), a pump housing (4), a valve core structure (5), a liquid inlet pipe (6) and a liquid outlet pipe (7), wherein the push rod device (2) comprises a push rod (21), a push rod device housing (3) is provided with a push cavity, the push rod (21) is placed in the push cavity, the rear end of the push rod device housing (3) is connected to the pump housing (4), the valve core structure (5) is installed in the pump housing (4), the liquid inlet pipe (6) and the liquid outlet pipe (7) are respectively connected to the front end and the rear end of the valve core structure (5), the drive device (1) is connected to the front end of the push rod (21), the drive device (1) can push the push rod (21) to move forward and backward, the front end of the push rod (21) extends to the front end of the valve core structure (5), the push rod (21) is used to push the liquid medium in the liquid inlet pipe (6) to the liquid outlet pipe (7) through the valve core structure (5), and the characteristics are: The push rod (21) is covered with a plurality of guide sleeves (8), the inner side of the guide sleeve (8) is sealed with the push rod (21), the outer side of the guide sleeve (8) is sealed with the push rod device housing (3), and the gaps between adjacent guide sleeves (8) are matched, and the gaps between adjacent guide sleeves (8) are filled by guide springs (81) or elastic pads (82) or balls (83).

2. The high-pressure pump valve of a descaling device with a multi-section guide sleeve according to claim 1, characterized in that: The driving device (1) includes a driving rod (11) and a driving seat (12), one end of the driving rod (11) is connected to an external eccentric wheel structure, and the eccentric wheel structure can drive the driving rod (11) to perform reciprocating motion, the other end of the driving rod (11) is connected to the driving seat (12), and the driving seat (12) is connected to the front end of the push rod (21).

3. The high-pressure pump valve of a descaling device with a multi-section guide sleeve according to claim 2, characterized in that: The driving seat (12) is connected to the front end of the push rod (21) through a buffer, and the buffer includes a buffer seat (13), a buffer spring (14) and a locking bolt (15). The buffer seat (13) is provided with a cavity that passes through the front and back, and the front end of the push rod (21) passes through the cavity of the buffer seat (13). The front end of the push rod (21) is also provided with a protruding push rod end (22). One end of the buffer spring (14) is in contact with the cavity of the buffer seat (13), and the other end is in contact with the push rod end (22). The buffer seat (13) is fixedly connected to the driving seat (12) through the locking bolt (15).

4. The high-pressure pump valve of a descaling device with a multi-section guide sleeve according to claim 1, characterized in that: The push rod (21) is covered with four guide sleeves (8), and the structure arranged between the push rod (21) and the push rod device housing (3) is as follows from front to back: a guide sleeve (8), an elastic pad (82), a guide sleeve (8), a ball (83), a guide sleeve (8), a guide spring (81) and a guide sleeve (8).

5. The high-pressure pump valve of a descaling device with a multi-section guide sleeve according to claim 3, characterized in that: The push rod device housing (3) is provided with a reflux channel (31) connected to the outside world, a reflux chamber (32) is provided between the rear end of the push rod (21) and the push rod device housing (3), the reflux chamber (32) is connected to the reflux channel (31), the reflux chamber (32) is connected to the liquid inlet pipe (6), a valve plate and a tension spring (33) are provided in the reflux chamber (32), one end of the tension spring (33) is fixedly connected to the front end of the valve core structure (5), and the other end is connected to the valve plate, the tension spring (33) pulls the valve plate to block the connection between the reflux chamber (32) and the reflux channel (31), when the liquid inlet pressure in the liquid inlet pipe (6) is greater than the tension of the tension spring (33), the liquid inlet pressure can push open the valve plate, so that the reflux chamber (32) is connected to the reflux channel (31).

6. The high-pressure pump valve of a descaling device with a multi-section guide sleeve according to claim 5, characterized in that: The valve core structure (5) includes a valve seat (51), a discharge valve core (52), and a discharge spring (53). The valve seat (51) divides the internal space of the pump housing (4) into a pre-valve liquid chamber (41) and a post-valve liquid chamber (42). The pre-valve liquid chamber (41) is connected to the liquid inlet pipe (6), and the post-valve liquid chamber (42) is connected to the liquid outlet pipe (7). The valve seat (51) is provided with a valve seat hole (54) that passes through the front and back of the valve seat. The valve seat hole (54) is connected to the pre-valve liquid chamber (41) and the post-valve liquid chamber (42). The discharge valve core (52) and the drain spring (53) are both installed in the rear liquid chamber (42) of the valve. One end of the drain spring (53) is fixedly connected to the wall of the rear liquid chamber (42) of the valve, and the other end is fixedly connected to the drain valve core (52). The drain spring (53) pushes the drain valve core (52) toward the rear end of the valve seat hole (54), so that the drain valve core (52) closes the valve seat hole (54). When the liquid inlet pressure in the liquid inlet pipe (6) is greater than the thrust of the drain spring (53), the liquid inlet pressure can push open the drain valve core (52), so that the valve seat hole (54) is connected to the liquid outlet pipe (7).

7. The high-pressure pump valve of a descaling device with a multi-section guide sleeve according to claim 6, characterized in that: The rear end of the valve seat hole (54) is a flared structure, and the front end of the corresponding discharge valve core (52) is a pointed structure, and the shape of the pointed structure matches the shape of the flared structure.

8. The high-pressure pump valve of a descaling device with a multi-section guide sleeve according to claim 7, characterized in that: The outer side of the drain valve core (52) is covered with a drain valve sleeve (55), and the drain valve sleeve (55) is fixed in the valve rear liquid cavity (42). The drain valve core (52) can slide back and forth in the drain valve sleeve (55).

9. The high-pressure pump valve of a descaling device with a multi-section guide sleeve according to claim 8, characterized in that: The drain valve sleeve (55) is provided with a valve sleeve hole (56), and the valve sleeve hole (56) passes through the inner side and the outer side of the drain valve sleeve (55).

10. The high-pressure pump valve of a descaling device with a multi-section guide sleeve according to claim 4, characterized in that: The guide sleeve (8) is made of rubber material.

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