Valve limiting gland device capable of suppressing leakage

Abstract

The utility model discloses a valve limiting gland device capable of suppressing leakage, which relates to the technical field of valve glands and comprises a valve cover for mounting and sealing a valve, a plurality of cushion blocks are arranged in the valve cover, a gland for applying extrusion force to the cushion blocks is mounted at the top end of the valve cover, and a limiting mechanism is arranged on the gland. The limiting mechanism is used for preventing leakage after the cushion block is aged and damaged; the limiting mechanism comprises an extrusion unit and an alarm unit. Through the arrangement of the limiting mechanism, after the cushion blocks are aged and damaged, under the extrusion force of the spring, the abutting block abuts against the cushion block on the uppermost layer all the time, sealing of the cushion blocks is completed, the movable rod and the signal transmitter are synchronously driven to move downwards, the signal transmitter and the signal inductor are made to be staggered, and the sealing effect is achieved. And the signal inductor sends out an electric signal to remind a worker to carry out maintenance, so that the working efficiency is further improved, and the leakage condition is effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of valve glands, in particular to a valve limit gland device capable of suppressing leakage. Background Art

[0002] The valve cover is a device used to fix the valve stem. It has two important functions during the use of the valve: one is to position the valve stem to ensure the normal transmission of the valve stem; the other is to seal with a certain strength to prevent the internal fluid from flowing out.

[0003] In the prior art, when sealing the valve stem position, multiple gaskets are generally used, and the gaskets are given extrusion pressure by the pressure cover to achieve the sealing effect. The sealing gasket at the bottom end of the valve limit pressure cover is deformed and aged due to long-term use, which will increase the gap between the sealing gasket and the pressure cover. The pressure cover fixed by bolts can no longer give extrusion pressure to the gasket, resulting in reduced sealing performance and failure to notify the staff in time. For this reason, the utility model proposes a valve limit pressure cover device that can suppress leakage. Utility Model Content

[0004] The purpose of the utility model is to provide a valve limiting gland device capable of suppressing leakage in order to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a valve limiting gland device capable of suppressing leakage, comprising a valve cover for installing a sealing valve, a plurality of cushion blocks are arranged inside the valve cover, a gland for applying extrusion force to the cushion blocks is arranged on the top of the valve cover, and a limiting mechanism is arranged on the gland, and the limiting mechanism is used to prevent leakage from occurring after the cushion blocks are aged and damaged;

[0006] The limiting mechanism includes a squeezing unit and an alarm unit;

[0007] The extrusion unit is used to always provide downward extrusion force to the cushion block, so that the cushion block remains in a sealed state;

[0008] The alarm unit is used to remind the staff after the squeezing unit moves a certain distance.

[0009] As a further solution of the utility model: the extrusion unit includes a signal transmitter, a fixing plate, a spring, a guide block, and a stop block;

[0010] The signal transmitter is vertically slidably installed inside the gland and penetrates to the top outer wall of the gland, and the signal transmitter is used to transmit downward extrusion force to the stopper;

[0011] The fixing plate is fixed to the outer wall of the signal transmitter and is located in the inner cavity of the gland, and the fixing plate is used to receive the extrusion elastic force from the spring;

[0012] The two ends of the spring are respectively clamped on the top of the fixed disk and the inner cavity of the gland, and the spring is used to always provide a downward thrust for the fixed disk;

[0013] The guide block is fixed at the bottom end of the signal transmitter and extends to the outside of the bottom end of the gland, and the guide block is used to drive the stop block to move synchronously;

[0014] The stop block is fixed at the bottom end of the guide block and contacts the top end of the cushion block, and the stop block is used to give the cushion block an extrusion force.

[0015] As a further solution of the utility model: the alarm unit includes a signal sensor and a movable rod;

[0016] The signal sensor is fixed on the top of the gland, and is used to transmit an electrical signal to the controller when the signal sensor is misaligned with the movable rod, so as to remind the staff through the controller;

[0017] The movable rod is fixed on the top of the signal transmitter, and the movable rod is used to transmit the signal after the signal transmitter moves to the signal sensor.

[0018] As a further solution of the utility model: the signal sensor and the movable rod are both electrically connected to an external power source through a wire, and the movable rod and the signal sensor are initially in a parallel line.

[0019] As a further solution of the utility model: an infrared ray emitting toward a signal sensor is installed inside the movable rod, and a sensor receiving infrared ray is installed on an outer wall of the movable rod.

[0020] As a further solution of the utility model: the outer wall of the guide block is annular in structure as a whole, the cross-section of the outer wall of the guide block is "L"-shaped, and the inner cavity of the pressure cover is formed with a sliding groove for the guide block to move vertically.

[0021] As a further solution of the utility model: the outer walls of the signal transmitter and the fixed disk are in a "cross" shape as a whole, and the inner cavity of the pressure cover is formed with a movable groove for the vertical use of the fixed disk.

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] By setting a limit mechanism, after the gasket is aged and damaged, under the extrusion force of the spring, the block always presses against the uppermost gasket, completing the sealing of the gasket, and simultaneously driving the movable rod and the signal transmitter downward, so that the signal transmitter and the signal sensor are misaligned, and the signal sensor sends an electrical signal to remind the staff to perform maintenance, further improving work efficiency and effectively preventing the occurrence of leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the utility model;

[0025] Figure 2 This is a cross-sectional view of the internal structure of the valve cover of the utility model;

[0026] Figure 3 It is a partial enlarged view of point A of the present utility model.

[0027] In the figure: 1, valve cover; 2, pressure cover; 3, gasket; 4, limit mechanism; 401, signal sensor; 402, signal transmitter; 403, movable rod; 404, fixed plate; 405, spring; 406, guide block; 407, stop block. 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-Figure 3 In the embodiment of the utility model, a valve limiting gland device capable of suppressing leakage comprises a valve cover 1 for installing and sealing the valve, a plurality of cushion blocks 3 are arranged inside the valve cover 1, a gland 2 for applying extrusion force to the cushion blocks 3 is arranged on the top of the valve cover 1, and a limiting mechanism 4 is arranged on the gland 2, and the limiting mechanism 4 is used to prevent leakage after the cushion blocks 3 are aged and damaged;

[0030] The limiting mechanism 4 includes a squeezing unit and an alarm unit;

[0031] The extrusion unit is used to always provide downward extrusion force to the cushion block 3 so that the cushion block 3 remains in a sealed state;

[0032] The alarm unit is used to remind the staff after the extrusion unit moves a certain distance.

[0033] The extrusion unit includes a signal transmitter 402, a fixing plate 404, a spring 405, a guide block 406, and a stop block 407;

[0034] The signal transmitter 402 is vertically slidably installed inside the gland 2 and penetrates the top outer wall of the gland 2. The signal transmitter 402 is used to transmit downward squeezing force to the stopper 407.

[0035] The fixing plate 404 is fixed to the outer wall of the signal transmitter 402 and is located in the inner cavity of the gland 2. The fixing plate 404 is used to receive the squeezing elastic force from the spring 405.

[0036] The two ends of the spring 405 are respectively clamped on the top of the fixed plate 404 and the inner cavity of the gland 2, and the spring 405 is used to always provide a downward thrust for the fixed plate 404;

[0037] The guide block 406 is fixed at the bottom end of the signal transmitter 402 and extends to the outside of the bottom end of the gland 2. The guide block 406 is used to drive the stop block 407 to move synchronously.

[0038] The stopper 407 is fixed to the bottom end of the guide block 406 and contacts the top end of the cushion block 3 . The stopper 407 is used to apply a squeezing force to the cushion block 3 .

[0039] The alarm unit includes a signal sensor 401 and a movable rod 403;

[0040] The signal sensor 401 is fixed on the top of the gland 2. The signal sensor 401 is used to transmit an electrical signal to the controller when it is misaligned with the movable rod 403, so as to remind the staff through the controller;

[0041] The movable rod 403 is fixed on the top of the signal transmitter 402 , and the movable rod 403 is used to transmit the signal after the signal transmitter 402 moves to the signal sensor 401 .

[0042] In this embodiment: when using this device, when the cushion block 3 is damaged due to aging, a certain gap will appear between the damaged cushion blocks 3. At this time, the fixed plate 404 will be moved downward by the extrusion thrust from the spring 405. The downward moving fixed plate 404 will synchronously drive the signal transmitter 402 to move. The movement of the signal transmitter 402 will synchronously push the guide block 406 to move downward. The guide block 406 will move downward along the inner cavity sliding groove of the gland 2, and synchronously drive the stopper 407 to move downward, so that the stopper 407 always contacts the outer wall of the cushion block 3. The aged and broken cushion block 3 will still be in a sealed state under the extrusion force of the stopper 407.

[0043] At the same time, the signal transmitter 402 moving downward synchronously drives the movable rod 403 to move downward, so that the infrared transmitter installed on the movable rod 403 and the receiver on the signal sensor 401 are misaligned and are no longer on the same horizontal line. Then, the signal sensor 401 that cannot receive the signal transmits the electrical signal to the controller, which reminds the staff through the controller, so as to replace the aged and damaged pad 3 in time, avoid gas or liquid leakage, and improve safety.

[0044] Please refer to Figure 1-Figure 3The signal sensor 401 and the movable rod 403 are electrically connected to the external power supply through wires. The movable rod 403 and the signal sensor 401 are initially in parallel. The movable rod 403 is internally installed with infrared rays that emit to the signal sensor 401, and the outer wall of the movable rod 403 is installed with a sensor that receives infrared rays.

[0045] In this embodiment: through this structure, when the signal transmitter 402 moves downward due to the elastic force from the spring 405, the signal sensor 401 and the movable rod 403 are no longer in a horizontal position. When the signal sensor 401 and the movable rod 403 are completely misaligned, the signal sensor 401 transmits an electrical signal to the controller.

[0046] Please refer to Figure 1-Figure 3 The outer wall of the guide block 406 is annular in structure as a whole, the outer wall of the cross section of the guide block 406 is in an "L" shape, the inner cavity of the pressure cover 2 is formed with a sliding groove for the vertical movement of the guide block 406, the outer walls of the signal transmitter 402 and the fixed disk 404 are in a "cross" shape as a whole, and the inner cavity of the pressure cover 2 is formed with a movable groove for the vertical use of the fixed disk 404.

[0047] In this embodiment: this structure can be used to limit the moving distance of the guide block 406 , and after the fixed plate 404 is squeezed by the elastic force from the spring 405 , the fixed plate 404 moves downward along the inner cavity movable groove of the pressure cover 2 .

[0048] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A valve limit gland device capable of suppressing leakage, comprising a valve cover (1) for installing and sealing a valve, a plurality of cushion blocks (3) being arranged inside the valve cover (1), a gland (2) for applying a squeezing force to the cushion blocks (3) being arranged on the top of the valve cover (1), characterized in that: A limiting mechanism (4) is arranged on the gland (2), wherein the limiting mechanism (4) is used to prevent the cushion block (3) from leaking after being aged and damaged; The limiting mechanism (4) comprises a squeezing unit and an alarm unit; The extrusion unit is used to always provide a downward extrusion force for the cushion block (3), so that the cushion block (3) remains in a sealed state; The alarm unit is used to remind the staff after the squeezing unit moves a certain distance.

2. A valve limiting gland device capable of suppressing leakage according to claim 1, characterized in that: The extrusion unit comprises a signal transmitter (402), a fixing plate (404), a spring (405), a guide block (406), and a stop block (407); The signal transmitter (402) is vertically slidably mounted inside the gland (2) and penetrates the top outer wall of the gland (2), and the signal transmitter (402) is used to transmit downward squeezing force to the stopper (407); The fixing disk (404) is fixed to the outer wall of the signal transmitter (402) and is located in the inner cavity of the gland (2), and the fixing disk (404) is used to receive the extrusion elastic force from the spring (405); The two ends of the spring (405) are respectively clamped on the top of the fixed disk (404) and the inner cavity of the pressure cover (2), and the spring (405) is used to always provide a downward thrust for the fixed disk (404); The guide block (406) is fixed to the bottom end of the signal transmitter (402) and extends to the outside of the bottom end of the gland (2), and the guide block (406) is used to drive the stop block (407) to move synchronously; The stop block (407) is fixed to the bottom end of the guide block (406) and is in contact with the top end of the cushion block (3); the stop block (407) is used to apply a squeezing force to the cushion block (3).

3. A valve limiting gland device capable of suppressing leakage according to claim 1, characterized in that: The alarm unit comprises a signal sensor (401) and a movable rod (403); The signal sensor (401) is fixed to the top of the gland (2), and is used to transmit an electrical signal to the controller when the signal sensor (401) is misaligned with the movable rod (403), so as to alert the staff through the controller; The movable rod (403) is fixed on the top of the signal transmitter (402), and the movable rod (403) is used to transmit the signal after the signal transmitter (402) moves to the signal sensor (401).

4. A valve limiting gland device capable of suppressing leakage according to claim 3, characterized in that: The signal sensor (401) and the movable rod (403) are both electrically connected to an external power source via a wire, and the movable rod (403) and the signal sensor (401) are initially in a parallel line.

5. A valve limiting gland device capable of suppressing leakage according to claim 3, characterized in that: Infrared rays that emit to the signal sensor (401) are installed inside the movable rod (403), and a sensor that receives infrared rays is installed on the outer wall of the movable rod (403).

6. A valve limiting gland device capable of suppressing leakage according to claim 2, characterized in that: The outer wall of the guide block (406) is annular in structure as a whole, the cross-section of the outer wall of the guide block (406) is in an "L" shape, and the inner cavity of the gland (2) is formed with a sliding groove for the guide block (406) to move vertically.

7. A valve limiting gland device capable of suppressing leakage according to claim 2, characterized in that: The outer walls of the signal transmitter (402) and the fixed disk (404) are in a "cross" shape as a whole, and the inner cavity of the gland (2) is formed with a movable groove for the fixed disk (404) to be used vertically.

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