Bottom-mounted sleeve adjusting valve

Abstract

The utility model relates to a bottom-mounted sleeve regulating valve, which comprises a valve body, a valve core fixing seat and a valve core, a valve cavity is arranged in the valve body, a valve cover is arranged at the upper end of the valve body, a mounting hole is arranged on the valve cover, a valve rod is arranged in the mounting hole in a sliding manner, and the lower end of the valve cover extends into the valve cavity; the valve element fixing seat is fixedly installed at the lower end of the valve cavity through a fixing check ring, and a valve element hole is formed in the valve element fixing seat. A limiting connecting piece capable of being matched with the valve element fixing base is arranged on the fixing check ring. The bottom-mounted sleeve adjusting valve is adopted, a pilot balance structure is additionally arranged, the number of internal sealing pieces is reduced, and valve internal leakage caused by aging and damage of the sealing pieces in the valve under the high-temperature working condition is avoided; the valve element fixing seat is fixed through the fixing check ring and the limiting connecting piece, the free expansion direction is achieved, and the situation that the valve is stuck is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to adjusting valve technical field relates to a lower mounted sleeve adjusting valve. BACKGROUND

[0002] Adjusting valve is a kind of commonly used valve, usually, the adjusting valve under high temperature condition, internal sealing is realized by installing the sealing ring of graphite material, long-term use, graphite exists high temperature ageing phenomenon, the friction between sealing ring and valve core causes sealing ring wear, causes the leakage of valve, for some high temperature, high sealing requirement occasion, the service life of valve is short, need to replace accessory regularly, it is relatively inconvenient, and the valve core is deadlocked under the condition of high temperature expansion between balance cylinder and sleeve, to cause the valve to be unable to act. SUMMARY

[0003] In view of prior art deficiency, the utility model provides a lower mounted sleeve adjusting valve.

[0004] The utility model discloses the technical scheme that the above-mentioned technical problem is adopted:

[0005] A lower mounted sleeve adjusting valve, comprising:

[0006] Valve body, the valve body is opened in the valve cavity, and the upper end of valve body is provided with valve cover, and the installation hole is opened in valve cover, and the valve rod is slidably arranged in installation hole, and the lower end of valve cover extends into the inside of valve cavity;

[0007] Valve core fixing seat, the valve core fixing seat is fixedly installed in the lower end of valve cavity by fixed baffle, and the valve core hole is opened in valve core fixing seat;Fixed baffle is provided with the stopper connecting piece that can cooperate with valve core fixing seat;

[0008] Valve core, the valve core is slidably installed in valve core hole, and the upper end of valve core is provided with pilot hole, and the water hole that is communicated with pilot hole is opened on the middle part side wall of valve core, and the water hole is communicated with pilot hole by connecting hole;The pilot valve core that can cooperate with connecting hole is arranged in pilot hole, and the upper end of pilot valve core is connected with valve rod, and the upper end of pilot hole is provided with the limit gland that can cooperate with pilot valve core.

[0009] Preferably, the valve cavity is provided with a clamping groove for installing the fixed baffle.

[0010] Preferably, the upper end of the valve seat is provided with an outwardly protruding positioning protruding ring, and the lower end of the valve cavity is provided with a fixed boss capable of cooperating with the positioning protruding ring.

[0011] Preferably, the fixed baffle is provided with a threaded hole, and the limit connecting piece is screwed into the threaded hole, and the lower end of the limit connecting piece can cooperate with the upper end surface of the positioning protruding ring.

[0012] Preferably, the valve core fixing seat comprises a valve seat, a sleeve and an end cover, which are fixed into one body by welding.

[0013] Preferably, a fixing hole is formed in the upper end of the pilot valve core, and the lower end of the valve rod is screwed into the connecting hole.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] The utility model discloses a lower-mounted sleeve regulating valve, which is equipped with a pilot balance structure, reduces the number of internal sealing elements, avoids aging and damage of the internal sealing elements in the valve under high-temperature working conditions, and prevents internal leakage of the valve. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole structure schematic view of the utility model.

[0017] Figure 2 It is a valve body structure schematic view of the utility model.

[0018] Figure 3 It is a valve core fixing seat structure schematic view of the utility model.

[0019] Figure 4 It is a pilot valve core structure schematic view of the utility model.

[0020] In the drawing: 1, valve body;2, valve cavity;3, valve cover;5, mounting hole;6, valve rod;7, valve core fixing seat;8, fixed check ring;9, valve core hole;10, limit connecting piece;11, valve core;12, pilot hole;13, water through hole;14, connecting hole;15, pilot valve core;16, limit gland;17, clamping groove;18, positioning convex ring;19, fixed convex platform;20, threaded hole;21, valve seat;22, sleeve;23, end cover;24, fixing hole. DETAILED DESCRIPTION

[0021] In order to make the person skilled in the art better understand the utility model scheme, the technical scheme of the utility model will be described clearly and completely below in combination with the drawings.

[0022] The embodiment provides a lower-mounted sleeve regulating valve, which comprises a valve body 1, a valve core fixing seat 7 and a valve core 11.

[0023] As shown in the drawing, Figures 1-4 The valve body 1 is provided with a valve cavity 2, the upper end of the valve body 1 is provided with a valve cover 3, the valve cover 3 is provided with a mounting hole 5, and the valve cover 3 is used for sealing the valve body 1.

[0024] A valve stem 6 is slidably arranged in the mounting hole 5, and the lower end of the valve cover 3 extends into the valve cavity 2;

[0025] The valve core fixing seat 7 is fixedly arranged at the lower end of the valve cavity 2 by means of a fixing retainer 8, and a valve core hole 9 is formed in the valve core fixing seat 7; the fixing retainer 8 is provided with a limiting connector 10 capable of cooperating with the valve core fixing seat 7;

[0026] The valve core 11 is slidably arranged in the valve core hole 9, and a pilot hole 12 is formed in the upper end of the valve core 11; a water passage hole 13 is formed in the side wall of the middle part of the valve core 11 and is in communication with the pilot hole 12; the water passage hole 13 is in communication with the pilot hole 12 through a connecting hole 14; after the medium enters the water passage hole 13, it can flow out through the connecting hole 14 to the pilot hole 12;

[0027] A pilot valve core 15 capable of cooperating with the connecting hole 14 is arranged in the pilot hole 12, and the pilot valve core 15 can seal the connecting hole 14 to block the flow of the medium;

[0028] The upper end of the pilot valve core 15 is connected with the valve stem 6, and the upper end of the pilot hole 12 is provided with a limiting gland 16 capable of cooperating with the pilot valve core 15, and the limiting gland 16 plays a blocking role on the pilot valve core 15.

[0029] Further, a clamping groove 17 for mounting the fixing retainer 8 is formed in the valve cavity 2, and the fixing retainer 8 is clamped in the clamping groove 17.

[0030] Further, a positioning convex ring 18 protruding outward is arranged at the upper end of the valve core fixing seat 21, and a fixing boss 19 capable of cooperating with the positioning convex ring 18 is arranged at the lower end of the valve cavity 2; the positioning convex ring 18 and the fixing boss 19 cooperate to fix the position of the lower end of the valve core fixing seat 21.

[0031] Further, a threaded hole 20 is formed in the fixing retainer 8, and the limiting connector 10 is screwed in the threaded hole 20; the lower end of the limiting connector 10 can cooperate with the upper end surface of the positioning convex ring 18, and the limiting connector 10 fixes the position of the upper end of the valve core fixing seat 21.

[0032] Further, the valve core fixing seat 7 comprises a valve seat 21, a sleeve 22 and an end cover 23, which are integrally fixed by welding; the welding fixation makes the sleeve 22 and the end cover 23 firmly fixed on the valve seat 21; a medium passage is formed in the sleeve 22 to facilitate the flow of the medium.

[0033] Further, a fixing hole 24 is formed in the upper end of the pilot valve core 15, and the lower end of the valve stem 6 is screwed in the connecting hole 14; the threaded connection facilitates disassembly.

[0034] Working principle: the utility model discloses a pilot balance structure replaces the balance cylinder type balance structure, by setting up pilot hole on the valve core 11, pilot hole 12 is provided with pilot valve core 15, does not need sealing ring, avoids the aging damage of valve internal sealing element under high temperature working condition and leads to the valve leakage, the integrated valve fixed base 7 is fixed through fixed baffle ring 8 and spacing connecting piece 10, the expansion direction is free under high temperature, and radial and axial can release the expansion under high temperature, avoids the situation of valve jam.

[0035] It can be understood that the above embodiments are only exemplary embodiments for illustrating the principles of the present application, and the present application is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present application, and these modifications and improvements are also considered within the protection scope of the present application.

Claims

1. A bottom-mounted sleeve regulating valve, comprising: A valve body (1), wherein a valve cavity (2) is formed in the valve body (1), a valve cover (3) is provided at the upper end of the valve body (1), a mounting hole (5) is formed on the valve cover (3), a valve stem (6) is slidably provided in the mounting hole (5), and the lower end of the valve cover (3) extends into the interior of the valve cavity (2); A valve core fixing seat (7), wherein the valve core fixing seat (7) is fixedly mounted on the lower end of the valve cavity (2) by means of a fixed retaining ring (8), and a valve core hole (9) is provided in the valve core fixing seat (7); a position limiting connector (10) capable of cooperating with the valve core fixing seat (7) is provided on the fixed retaining ring (8); A valve core (11) is slidably mounted in the valve core hole (9); a pilot hole (12) is provided at the upper end of the valve core (11); a water hole (13) connected to the pilot hole (12) is provided on the middle side wall of the valve core (11); the water hole (13) and the pilot hole (12) are connected via a connecting hole (14); a pilot valve core (15) capable of cooperating with the connecting hole (14) is provided in the pilot hole (12); the upper end of the pilot valve core (15) is connected to the valve stem (6); and a limit pressure cover (16) capable of cooperating with the pilot valve core (15) is provided at the upper end of the pilot hole (12).

2. A bottom-mounted sleeve regulating valve according to claim 1, characterized in that: A slot (17) for mounting a fixed retaining ring (8) is provided in the valve cavity (2).

3. A bottom-mounted sleeve regulating valve according to claim 1, characterized in that: The upper end of the valve core fixing seat (7) is provided with a positioning convex ring (18) protruding outward, and the lower end of the valve cavity (2) is provided with a fixing boss (19) capable of cooperating with the positioning convex ring (18).

4. The bottom-mounted sleeve regulating valve according to claim 1, characterized in that: A threaded hole (20) is provided on the fixed retaining ring (8), and the position-limiting connecting member (10) is screwed into the threaded hole (20). The lower end of the position-limiting connecting member (10) can cooperate with the upper end surface of the positioning convex ring (18).

5. The bottom-mounted sleeve regulating valve according to claim 1, characterized in that: The valve core fixing seat (7) comprises a valve seat (21), a sleeve (22) and an end cover (23), which are fixed into one piece by welding.

6. The bottom-mounted sleeve regulating valve according to claim 1, characterized in that: The upper end of the pilot valve core (15) is provided with a fixing hole (24), and the lower end of the valve stem (6) is screwed into the connecting hole (14).

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