A throttling stop valve

Abstract

The utility model relates to the technical field of stop valves, and specifically to a throttling stop valve, comprising a valve body, the inner wall of the valve body is provided with a valve cavity, the inner wall at the top of the valve cavity is rotatably connected to a valve stem, and a sealing assembly is provided at one end of the valve stem, the sealing assembly comprises a fixed seat, and a mounting sleeve is fixedly connected to the outer wall at the top of the fixed seat, the inner wall of the mounting sleeve is provided with two symmetrical limiting grooves, the interior of the valve stem is provided with a mounting cavity, and the inner walls on both sides of the mounting cavity are provided with symmetrically arranged sliding openings. The utility model overcomes the shortcomings of the prior art, and by installing the mounting sleeve outside the fixed seat on the sealing assembly, the limiting groove in the mounting sleeve cooperates with two adjustable limiting blocks on the valve stem, so that the fixed seat is conveniently fixed on the valve stem, and the convenient disassembly structure facilitates the replacement of the fixed seat on the valve stem, and solves the problem that the fixed seat and the valve disc in the valve body on the existing throttling valve are inconvenient to replace.

Description

Technical Field

[0001] The utility model relates to the technical field of stop valves, in particular to a throttling stop valve. Background Art

[0002] The stop valve, also known as the gate valve, is a forced sealing valve and one of the most widely used valves. It is popular because the friction between the sealing surfaces during opening and closing is small, it is relatively durable, the opening height is not large, it is easy to manufacture and maintain.

[0003] After searching, the Chinese patent application number CN212775608U discloses a throttling stop valve, including a valve body, a valve cover is threadedly connected to the top of the valve body through a gasket, a pressure cap is threadedly connected to the top of the valve cover, a valve stem is penetrated through the top of the pressure cap, sliding grooves are provided on both sides of the bottom of the valve cover, a sealing plate is fixedly connected between the two sides of the inner wall of the valve body, a sealing gasket is adhered to the top of the sealing plate, the bottom of the sealing plate penetrates the limiting frame, the top of the limiting frame penetrates the sealing gasket and the sliding groove in turn and extends to the inside of the sliding groove, the limiting frame is slidably connected to the sliding groove, the bottom end of the valve stem penetrates the valve cover, the sealing gasket, and the sealing plate in turn and extends to the bottom of the sealing plate, the bottom end of the valve stem is rotatably connected to the top of the inner wall of the limiting frame, and the valve stem is threadedly connected to the valve cover.

[0004] A throttling stop valve in the above patent has the following shortcomings: in the above patent, the on-off of the valve body is controlled by the cooperation between the fixed seat and the valve disc, but since the fixed seat is in the valve body for a long time, long-term contact with steam will accelerate the damage of the fixed seat, and since the fixed seat is fixed on the valve stem, it is inconvenient to replace it. Summary of the invention

[0005] The purpose of the utility model is to solve or at least alleviate the problems existing in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a throttling stop valve, comprising a valve body, an inner wall of the valve body is provided with a valve cavity, the inner wall at the top of the valve cavity is rotatably connected to a valve stem, and a sealing assembly is arranged at one end of the valve stem, the sealing assembly comprises a fixed seat, and an installation sleeve is fixedly connected to the outer wall at the top of the fixed seat, the inner wall of the installation sleeve is provided with two symmetrical limit grooves, an installation cavity is provided inside the valve stem, and symmetrically arranged sliding openings are provided on the inner walls on both sides of the installation cavity, the inner walls of the two sliding openings are both slidably connected to limit blocks, and the specifications of the limit blocks match the specifications of the limit grooves.

[0007] With the above structure, by arranging a mounting sleeve on the fixing seat in the sealing assembly, the limiting groove in the mounting sleeve and the limiting block in the valve stem match each other, so that the fixing seat can be quickly disassembled.

[0008] The inner walls on both sides of the installation cavity are rotatably connected with a same screw rod, and the outer wall of the screw rod is screwed with a trapezoidal block.

[0009] With the above structure, the trapezoidal block can be directly driven to move in the installation cavity by the rotation of the screw.

[0010] The outer wall of the trapezoidal block is provided with two slide grooves, and the two limit blocks are respectively slidably connected to the inner walls of the two slide grooves, and the outer wall of the bottom of the valve stem is fixedly connected with a high-temperature resistant rubber pad.

[0011] With the above structure, the high temperature resistant rubber pad is in contact with the inner wall of the mounting sleeve, thereby reducing the wear between the valve stem and the mounting sleeve.

[0012] The outer wall of the valve stem is fixedly connected with a positioning block, and the inner wall of the mounting sleeve is provided with a positioning groove matching the positioning block.

[0013] With the above structure, the valve stem can be conveniently positioned through the cooperation between the positioning block and the positioning groove.

[0014] The outer wall of the valve body is fixedly connected with a mounting seat, and the outer wall at the top of the mounting seat is rotatably connected with a driving disk connected with the valve stem.

[0015] With the above structure, the valve stem can be directly driven to rotate by setting the driving disk.

[0016] A knob is rotatably connected to the outer wall of the top of the driving disk, and one end of the knob transmission shaft penetrates the valve stem and is connected to the screw rod.

[0017] With the above structure, the screw rod can be directly driven to rotate by turning the knob, thereby driving the trapezoidal block to move.

[0018] The specifications of the valve stem match the specifications of the inner diameter of the mounting sleeve.

[0019] With the above structure, the valve stem can be directly inserted into the installation sleeve conveniently.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] The utility model installs a mounting sleeve outside the fixing seat on the sealing component, and the limiting groove in the mounting sleeve cooperates with two adjustable limiting blocks on the valve stem, so that the fixing seat is conveniently fixed on the valve stem, and the convenient disassembly structure facilitates the replacement of the fixing seat on the valve stem, thereby solving the problem that the fixing seat and the valve disc in the valve body of the existing throttle valve are inconvenient to replace;

[0022] The utility model facilitates the adjustment of the positions of the two limit blocks by arranging the cooperation between the screw rod and the trapezoidal block in the installation cavity on the valve stem. When the limit block is inserted into the limit groove in the installation sleeve, the fixing seat can be conveniently installed on the valve stem. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the cross-sectional structure of the valve body of the utility model;

[0025] Figure 3 This is a schematic diagram of the fixing seat structure of the utility model;

[0026] Figure 4 It is a schematic diagram of a partial cross-sectional structure of the valve stem of the utility model.

[0027] In the figure: 1. valve body; 2. mounting seat; 3. drive plate; 4. knob; 5. valve chamber; 6. sealing assembly; 7. valve stem; 8. fixing seat; 9. mounting sleeve; 10. limiting groove; 11. positioning groove; 12. mounting chamber; 13. screw; 14. trapezoidal block; 15. limiting block; 16. rubber pad. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-4 A throttling stop valve comprises a valve body 1, the inner wall of the valve body 1 is provided with a valve cavity 5, the inner wall at the top of the valve cavity 5 is rotatably connected with a valve stem 7, and a sealing assembly 6 is arranged at one end of the valve stem 7, the sealing assembly 6 comprises a fixed seat 8, and a mounting sleeve 9 is fixedly connected with a mounting sleeve 9 on the outer wall at the top of the fixed seat 8, the inner wall of the mounting sleeve 9 is provided with two symmetrical limiting grooves 10, an installation cavity 12 is provided inside the valve stem 7, and symmetrically arranged sliding openings are provided on the inner walls of the two sliding openings, the inner walls of the two sliding openings are both slidably connected with limiting blocks 15, and the specifications of the limiting blocks 15 match those of the limiting grooves 10, by arranging the mounting sleeve 9 on the fixed seat 8 in the sealing assembly 6, the limiting grooves 10 in the mounting sleeve 9 and the limiting blocks 15 in the valve stem 7 match each other, so that the fixed seat 8 can be quickly disassembled conveniently.

[0030] For details, please refer to Figure 4 The inner walls of both sides of the installation cavity 12 are rotatably connected with the same screw rod 13, and the outer wall of the screw rod 13 is screwed with a trapezoidal block 14, and the rotation of the screw rod 13 can directly drive the trapezoidal block 14 to move in the installation cavity 12.

[0031] For details, please refer to Figure 4The outer wall of the trapezoidal block 14 is provided with two slide grooves, and the two limit blocks 15 are respectively slidably connected to the inner walls of the two slide grooves. A high-temperature resistant rubber pad 16 is fixedly connected to the outer wall of the bottom of the valve stem 7. The high-temperature resistant rubber pad 16 is in contact with the inner wall of the mounting sleeve 9 to reduce the wear between the valve stem 7 and the mounting sleeve 9.

[0032] For details, please refer to Figure 4 The outer wall of the valve stem 7 is fixedly connected with a positioning block, and the inner wall of the mounting sleeve 9 is provided with a positioning groove 11 matching the positioning block. The valve stem 7 is conveniently positioned through the cooperation between the positioning block and the positioning groove 11.

[0033] For details, please refer to Figure 1 The outer wall of the valve body 1 is fixedly connected with a mounting seat 2, and the top outer wall of the mounting seat 2 is rotatably connected with a driving disk 3 connected to the valve stem 7. The arrangement of the driving disk 3 facilitates direct driving of the valve stem 7 to rotate.

[0034] For details, please refer to Figure 1 The top outer wall of the driving disk 3 is rotatably connected with a knob 4, and one end of the transmission shaft of the knob 4 passes through the valve stem 7 and is connected to the screw 13. The rotation of the knob 4 can directly drive the screw 13 to rotate, thereby conveniently driving the trapezoidal block 14 to move.

[0035] For details, please refer to Figure 3-4 The specifications of the valve stem 7 match the specifications of the inner diameter of the mounting sleeve 9, and the valve stem 7 can be directly inserted into the mounting sleeve 9 conveniently.

[0036] Working principle: When in use, the valve stem 7 is driven to rise by rotating the driving disk 3, and then the sealing assembly 6 is driven to rise, so that the throttle valve is opened, otherwise the throttle valve is closed. When the fixed seat 8 in the sealing assembly 6 needs to be replaced, first turn the knob 4 to drive the screw 13 to rotate. When the screw 13 rotates, it drives the trapezoidal block 14 to rise and fall. When the trapezoidal block 14 rises, it directly drives the two limit blocks 15 to be received into the installation cavity 12. When the limit block 15 is away from the limit groove 10, the fixed seat 8 can be removed from the valve stem 7, which makes it convenient to replace the fixed seat 8.

[0037] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A throttling stop valve, comprising a valve body (1), characterized in that: The inner wall of the valve body (1) is provided with a valve cavity (5), the top inner wall of the valve cavity (5) is rotatably connected to a valve stem (7), and a sealing assembly (6) is provided at one end of the valve stem (7), the sealing assembly (6) comprises a fixed seat (8), and the top outer wall of the fixed seat (8) is fixedly connected to a mounting sleeve (9), the inner wall of the mounting sleeve (9) is provided with two symmetrical limit grooves (10), the interior of the valve stem (7) is provided with a mounting cavity (12), and the inner walls on both sides of the mounting cavity (12) are provided with symmetrically arranged sliding openings, the inner walls of the two sliding openings are both slidably connected to limit blocks (15), and the specifications of the limit blocks (15) match those of the limit grooves (10).

2. A throttling stop valve according to claim 1, characterized in that: The inner walls on both sides of the installation cavity (12) are rotatably connected to a same screw rod (13), and the outer wall of the screw rod (13) is screwed to a trapezoidal block (14).

3. A throttling stop valve according to claim 2, characterized in that: The outer wall of the trapezoidal block (14) is provided with two slide grooves, the two limit blocks (15) are slidably connected to the inner walls of the two slide grooves respectively, and a high-temperature resistant rubber pad (16) is fixedly connected to the outer wall of the bottom of the valve stem (7).

4. A throttling stop valve according to claim 3, characterized in that: A positioning block is fixedly connected to the outer wall of the valve stem (7), and a positioning groove (11) matching the positioning block is formed on the inner wall of the mounting sleeve (9).

5. A throttling stop valve according to claim 4, characterized in that: The outer wall of the valve body (1) is fixedly connected to a mounting seat (2), and the top outer wall of the mounting seat (2) is rotatably connected to a drive disk (3) connected to the valve stem (7).

6. A throttling stop valve according to claim 5, characterized in that: The top outer wall of the driving disk (3) is rotatably connected to a knob (4), and one end of a transmission shaft of the knob (4) passes through the valve stem (7) and is connected to the screw rod (13).

7. A throttling stop valve according to claim 6, characterized in that: The specifications of the valve stem (7) match the specifications of the inner diameter of the mounting sleeve (9).

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