Soft sealing gate valve convenient to maintain

Abstract

The soft sealing gate valve convenient to maintain comprises a valve body, a valve cover is arranged at the top of the valve body, a valve rod is connected to the top end of the valve cover in a penetrating mode, an annular column is arranged on the outer side of the valve rod in a sleeved mode, a gland is arranged at the top of the annular column, screws are symmetrically arranged at the bottom of the gland, connecting components are arranged at the bottoms of the screws, and locking components are symmetrically arranged on the sides of the valve cover. The locking component comprises a sleeve arranged on the side of the valve deck, and an insertion rod used for locking the connecting component is connected into the sleeve in a penetrating mode. The connecting component used for tensioning the gland is arranged at the bottom of the gland, the connecting component is fixed through the locking component, the sleeves in the locking component are symmetrically arranged on the two sides of the valve deck, and the connecting component and the valve deck are connected and limited through the inserting rod penetrating through the inner cavity of the locking component. According to the mode, after the screw rod in the connecting component is impacted by the sealing filler to generate thread damage, the hinged screw rod can be quickly replaced, and the normal use of the gate valve is prevented from being influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of gate valves, in particular to a soft-sealed gate valve which is easy to maintain. Background Art

[0002] The soft-sealed gate valve is an industrial valve mainly used to cut off or connect the medium in the pipeline. The opening and closing part of the soft-sealed gate valve is the gate, and its movement direction is perpendicular to the direction of the fluid, so it can only be fully opened or fully closed, and cannot be used to adjust the flow. The gate has two sealing surfaces to form a wedge. The size of the wedge angle depends on the valve parameters. The gate can be rigid or elastic, which can produce a slight deformation, to improve the processability and compensate for the deviation of the sealing surface during processing and assembly. The top of the valve cover of the soft-sealed gate valve with a rising stem is provided with a pressure-tightening The gland of the sealing packing has screws on both sides of the valve cover that are interlaced with the gland threads. The bottom of the screw is hinged to the side of the valve cover. The gland is affected by the long-term impact and vibration of the fluid in the valve body, which causes the threads on the outside of the screw to be worn and damaged, and the screw needs to be replaced. The bottom of the existing screw is generally limited by an articulated rod, and the articulated rod is limited by crimping. This crimping and fixing method is not convenient for disassembly of the articulated rod, which affects the replacement and maintenance of the screw. In order to solve this problem, a soft-sealed gate valve that is easy to maintain is needed. Utility Model Content

[0003] The utility model aims to provide a soft-sealed gate valve which is easy to maintain, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a soft-sealed gate valve that is easy to maintain, comprising a valve body, a valve cover is arranged on the top of the valve body, a valve stem is inserted and connected to the top end of the valve cover, a ring column for fixing a sealing packing is sleeved on the outer side of the valve stem, a pressure cover is arranged on the top of the ring column, screws are symmetrically arranged on the bottom of the pressure cover, a connecting member for connecting the valve cover is arranged on the bottom of the screw, locking members for fixing the connecting members are symmetrically arranged on the side of the valve cover, and the locking member comprises a sleeve arranged on the side of the valve cover, and a plug rod for locking the connecting member is inserted and connected to the inside of the sleeve.

[0005] Preferably, the connecting member comprises a limiting ring, the bottom of the screw rod is fixedly connected to the side of the limiting ring, and a nut for fixing the gland is sleeved on the outer side of the screw rod and located on the top of the gland.

[0006] Preferably, the sides of the valve cover are symmetrically provided with limiting protrusions for placing the limiting ring.

[0007] Preferably, the end of the insertion rod is sequentially inserted and connected to the side of the limiting protrusion and the middle of the limiting ring, and the end of the sleeve is fixedly connected to the side of the limiting protrusion.

[0008] Preferably, a fixing ring and a compression spring are sleeved on the outside of the insertion rod and inside the sleeve, and the fixing ring is arranged at one end of the compression spring close to the limiting protrusion.

[0009] Preferably, a pull rod for assisting in pulling the insertion rod is fixedly connected to the end of the insertion rod.

[0010] Preferably, a turntable is provided at the top of the valve stem and at the top of the valve cover.

[0011] Technical effects and advantages of the utility model:

[0012] The utility model provides a connecting component for tightening the gland at the bottom of the gland, wherein the connecting component is fixed by a locking component, wherein sleeves in the locking component are symmetrically arranged on both sides of the valve cover, and an insertion rod inserted in the inner cavity thereof connects the connecting component and the valve cover to limit the position. This method can quickly replace the hinged screw after the thread of the screw in the connecting component is damaged by the impact of the sealing packing, thereby avoiding affecting the normal use of the gate valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0014] Figure 2 It is a side view of the utility model as a whole.

[0015] Figure 3 It is a cross-sectional view of the locking component of the utility model.

[0016] In the figure: 1. valve body; 2. valve cover; 201. limiting protrusion; 3. valve stem; 4. pressure cover; 5. ring column; 6. screw; 601. limiting ring; 7. nut; 8. locking member; 801. sleeve; 802. plug rod; 803. pull rod; 804. fixing ring; 805. compression spring; 9. turntable. DETAILED DESCRIPTION

[0017] 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.

[0018] The utility model provides Figure 1-3A maintenance-friendly soft-sealed gate valve shown in the figure comprises a valve body 1, a valve cover 2 is arranged on the top of the valve body 1, a valve stem 3 is inserted and connected to the top of the valve cover 2, a ring column 5 for fixing a sealing packing is sleeved on the outer side of the valve stem 3, a gland 4 is arranged on the top of the ring column 5, a screw 6 is symmetrically arranged on the bottom of the gland 4, and a turntable 9 is arranged on the top of the valve stem 3 and located on the top of the valve cover 2;

[0019] Specifically, a nut 7 for fixing the gland 4 is sleeved on the outer side of the screw 6 and located on the top of the gland 4;

[0020] It should be noted that a through hole for the screw 6 to be inserted is provided at the bottom of the gland 4, and the nut 7 and the threads on the outer side of the screw 6 are engaged with each other;

[0021] The bottom of the screw rod 6 is provided with a connecting member for connecting the valve cover 2;

[0022] Specifically, the connecting member includes a limiting ring 601, the bottom of the screw rod 6 is fixedly connected to the side of the limiting ring 601, and the side of the valve cover 2 is symmetrically provided with limiting protrusions 201 for placing the limiting ring 601;

[0023] It should be noted that the limiting ring 601 and the screw rod 6 are fixed by welding, a through hinge hole is provided on the side of the limiting protrusion 201, and a rotation groove for placing the limiting ring 601 is provided on the side of the limiting protrusion 201;

[0024] The side of the valve cover 2 is symmetrically provided with a locking member 8 for fixing the connecting member;

[0025] Specifically, the locking member 8 includes a sleeve 801 disposed on the side of the valve cover 2, an insert rod 802 for locking the connecting member is inserted and connected inside the sleeve 801, a pull rod 803 for assisting in pulling the insert rod 802 is fixedly connected to the end of the insert rod 802, and the end of the sleeve 801 is fixedly connected to the side of the limiting protrusion 201;

[0026] It should be noted that the sleeve 801 is fixed to the limiting protrusion 201 by welding, and the pull rod 803 is fixed to the insertion rod 802 by welding;

[0027] The ends of the insertion rod 802 are inserted and connected to the side of the limiting protrusion 201 and the middle of the limiting ring 601 in sequence. A fixing ring 804 and a compression spring 805 are sleeved on the outside of the insertion rod 802 and inside the sleeve 801. The fixing ring 804 is arranged at one end of the compression spring 805 close to the limiting protrusion 201.

[0028] It should be noted that the middle part of the fixing ring 804 is glued and fixed to the outer side of the plug rod 802. When the plug rod 802 is pulled, the fixing ring 804 squeezes the compression spring 805, so that the plug rod 802 is separated from the limiting ring 601, so as to replace the screw rod 6. The plug rod 802 is loosened, and the compression spring 805 drives the plug rod 802 to insert into the limiting ring 601 and the limiting protrusion 201, so as to complete the hinged fixation of the screw rod 6 for maintenance and replacement. After that, the nut 7 on the top of the gland 4 is threadedly rotated and fixed to the outer side of the screw rod 6, so that the gland 4 is squeezed and fixed to the sealing packing;

[0029] In actual use, a connecting component for tightening the pressure cover 4 is provided at the bottom of the pressure cover 4, wherein the connecting component is fixed by a locking component 8, wherein the sleeve 801 in the locking component 8 is symmetrically arranged on both sides of the valve cover 2, and the inserted rod 802 inserted in the inner cavity thereof connects the connecting component to the valve cover 2 for a limited position. In this way, after the thread of the screw 6 is damaged by the impact of the sealing packing, the hinged screw 6 can be quickly replaced without affecting the hinged rotation operation of the screw 6, and the screw 6 and the valve cover 2 can be limited and fixed, thereby preventing the screw 6 with damaged thread from affecting the normal use of the soft-sealed gate valve.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A soft-sealed gate valve that is easy to maintain, comprising a valve body (1), a valve cover (2) being arranged on the top of the valve body (1), a valve stem (3) being inserted and connected to the top of the valve cover (2), characterized in that: The outer side of the valve stem (3) is sleeved with a ring column (5) for fixing the sealing packing, the top of the ring column (5) is provided with a pressure cover (4), the bottom of the pressure cover (4) is symmetrically provided with a screw rod (6), the bottom of the screw rod (6) is provided with a connecting member for connecting to the valve cover (2), and the side of the valve cover (2) is symmetrically provided with a locking member (8) for fixing the connecting member, the locking member (8) comprises a sleeve (801) arranged on the side of the valve cover (2), and the sleeve (801) is internally inserted with an insertion rod (802) for locking the connecting member.

2. A soft-sealed gate valve that is easy to maintain according to claim 1, characterized in that: The connecting member comprises a limiting ring (601), the bottom of the screw rod (6) and the side of the limiting ring (601) are fixedly connected, and a nut (7) for fixing the gland (4) is sleeved on the outside of the screw rod (6) and located on the top of the gland (4).

3. A soft-sealed gate valve that is easy to maintain according to claim 2, characterized in that: The side of the valve cover (2) is symmetrically provided with limiting protrusions (201) for placing the limiting ring (601).

4. A soft-sealed gate valve that is easy to maintain according to claim 3, characterized in that: The end of the insertion rod (802) is inserted and connected to the side of the limiting protrusion (201) and the middle of the limiting ring (601) in sequence, and the end of the sleeve (801) is fixedly connected to the side of the limiting protrusion (201).

5. A soft-sealed gate valve that is easy to maintain according to claim 4, characterized in that: A fixing ring (804) and a compression spring (805) are sleeved on the outside of the insertion rod (802) and inside the sleeve (801); the fixing ring (804) is arranged at one end of the compression spring (805) close to the limiting protrusion (201).

6. A soft-sealed gate valve that is easy to maintain according to claim 5, characterized in that: A pull rod (803) for assisting in pulling the insertion rod (802) is fixedly connected to the end of the insertion rod (802).

7. The maintenance-friendly soft-sealed gate valve according to claim 1, characterized in that: A rotating disk (9) is provided at the top of the valve stem (3) and located at the top of the valve cover (2).

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