Stop valve with elastic packing sealing structure

Abstract

The utility model provides a stop valve with an elastic packing sealing structure, which comprises a valve body, a valve rod connected on the valve body, sealing packing arranged between the valve rod and the valve body, a packing gland connected on the valve body, and a spring sleeved on the valve rod, two ends of the spring respectively abutting against the sealing packing and the packing gland, an annular pressing piece is arranged between the spring and the sealing filler, and a protruding extrusion part is arranged on the side face, facing the sealing filler, of the pressing piece. The spring is arranged between the sealing filler and the filler gland to apply elastic force to the sealing filler, and under the action of the elastic force, the abraded sealing filler deforms to compensate the abrasion of the sealing filler, so that the service life of the sealing filler can be prolonged; the spring applies pressure to the sealing filler through the pressing piece and the extrusion part on the pressing piece, the elastic force can be dispersed towards the side where the valve body and the valve rod are located, and therefore the sealing filler, the valve body and the valve rod form effective sealing.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a stop valve with an elastic packing sealing structure. Background Art

[0002] The stop valve is a type of valve used to cut off the flow of media. The valve stem axis of the stop valve is perpendicular to the valve seat sealing surface, and the valve is opened and closed by driving the valve core up and down.

[0003] An existing stop valve includes a valve body, a valve stem connected to the valve body, a sealing packing between the valve stem and the valve body, a packing gland for pressing the fixed packing, and a packing gland fixedly connected to the valve body. For example, the stop valve disclosed in the patent authorization announcement number CN202392275U, and reference is made to its attached patent. Figure 1 shown.

[0004] The stop valve of the above structure will cause the sealing packing to wear when the valve stem moves up and down during use, thus affecting the service life of the sealing packing. Utility Model Content

[0005] In view of the problems pointed out in the background technology, the present invention proposes a stop valve with an elastic packing sealing structure to solve the above technical problems and increase the service life of the stop valve sealing packing.

[0006] The technical solution of the present utility model is achieved as follows:

[0007] A stop valve with an elastic packing sealing structure includes a valve body, a valve stem connected to the valve body, a sealing packing provided between the valve stem and the valve body, a packing gland connected to the valve body, and a spring, which is sleeved on the valve stem, and the two ends of the spring respectively resist the sealing packing and the packing gland.

[0008] The utility model is further configured such that an annular pressing sheet is provided between the spring and the sealing filler.

[0009] The utility model is further configured such that a protruding extrusion portion is provided on the side of the pressing sheet facing the sealing filler.

[0010] The present invention is further configured such that the extrusion portion is annular and the cross section of the extrusion portion is V-shaped.

[0011] The utility model is further configured such that the sealing filler is annular, and an extrusion groove corresponding to the extrusion portion is provided on the side of the sealing filler facing the spring, and the extrusion portion is connected to the extrusion groove.

[0012] The utility model is further configured such that the pressing sheet and the facing sheets of the sealing filler are spaced apart from each other.

[0013] The utility model is further configured such that the spring is a conical spring with one end being larger and the other end being smaller, and the smaller end of the spring abuts against the packing gland.

[0014] The utility model is further configured such that a connecting groove 1 for connecting a sealing filler is provided on the valve body, and the spring is connected in the connecting groove 1.

[0015] The utility model is further configured such that a second connecting groove for connecting a spring is provided on the packing valve cover.

[0016] The utility model is further configured such that the valve body and the packing gland are fixedly connected by screws, and the valve body and the packing gland are spaced apart.

[0017] By adopting the above technical solution, the beneficial effects of the utility model are:

[0018] The stop valve with an elastic packing sealing structure provided by the utility model has a spring arranged between the sealing packing and the packing gland to apply elastic force to the sealing packing. Under the action of the elastic force, the worn sealing packing is deformed, compensating for the wear of the sealing packing, thereby extending the service life of the sealing packing; the spring applies pressure to the sealing packing through the pressing plate and the extrusion part on the pressing plate, and the elastic force is dispersed toward the side where the valve body and the valve stem are located, thereby forming an effective seal between the sealing packing, the valve body and the valve stem. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 It is a structural diagram of an existing stop valve.

[0021] Figure 2 It is a structural diagram of the present utility model.

[0022] Figure 3 For this utility model Figure 2 Magnified view of part A.

[0023] Figure 4 It is a top view of the sealing filler of the utility model.

[0024] Description of the reference numerals in the accompanying drawings: valve body 1, valve stem 2, connecting groove 1 3, sealing packing 4, packing gland 5, spring 6, connecting groove 2 7, extrusion part 8, pressing piece 17, extrusion groove 9. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Reference as follows Figure 1-4 The utility model is described as follows:

[0027] Embodiment 1: A stop valve with an elastic packing sealing structure comprises a valve body 1, an axial hole for connecting a valve stem 2 is provided at the upper end of the valve body 1, a connecting groove 3 coaxial with the axial hole is provided on the upper end surface of the valve body 1, the connecting groove 3 is larger than the diameter of the axial hole on the valve body 1, an annular sealing packing 4 is provided between the valve stem and the valve body 1, the sealing packing 4 is connected in the connecting groove 3, the valve stem 2 passes through the sealing packing 4, a packing gland 5 is further connected to the upper end of the valve body 1, the valve body 1 and the packing gland 5 are fixedly connected by screws, the valve body 1 and the packing gland 5 are spaced apart in an upper and lower manner, and the packing gland 5 is provided with an axial hole for the valve stem 2 to pass through.

[0028] It also includes a spring 6, which is sleeved on the valve stem 2. The two ends of the spring 6 respectively abut against the sealing packing 4 and the packing gland 5. The spring 6 is a conical spring 6 with a larger lower end and a smaller upper end. The smaller end of the spring 6 abuts against the packing gland 5. The lower side of the packing valve cover 5 is provided with a connecting groove 2 7 for connecting to the spring 6. The connecting groove 2 7 is coaxially arranged with the axial hole in the packing valve cover 5. The diameter of the connecting groove 2 7 is larger than the diameter of the axial hole in the packing valve cover 5. The upper end of the spring 6 is connected to the connecting groove 2 7, and the lower end of the spring 6 is connected to the connecting groove 1 3.

[0029] The lower end of the spring 6 abuts against the sealing packing 4, and the upper end of the spring 6 abuts against the packing gland 5, and the spring 6 is in a compressed state. The spring 6 continuously applies elastic force to the sealing packing 4, so that the sealing packing 4 is in a sealed state with the valve body and valve stem. When the sealing packing 4 wears, the sealing packing 4 deforms under the action of the elastic force to compensate for the wear, thereby extending the service life of the sealing packing 4.

[0030] A circular pressure piece 17 is provided between the spring 6 and the sealing packing 4. The spring 6 applies the actual elastic force to the sealing packing 4 through the pressure piece 17, so that the elastic force is applied stably and evenly. A protruding extrusion portion 8 is provided on the side of the pressure piece 17 facing the sealing packing 4. The extrusion portion 8 is circular and has a V-shaped cross section. The pressure piece 17 applies elastic force to the sealing packing 4 through the extrusion portion 8. The V-shaped cross-section of the pressure-applying portion 8 can apply elastic force to the sealing packing 4 toward the valve stem and valve body, which further helps to improve the sealing performance. The pressure piece 17 and the facing piece of the sealing packing 4 are arranged at a distance from each other.

[0031] The sealing filler 4 is annular, and an extrusion groove 9 corresponding to the extrusion part 8 is provided on the side of the sealing filler 4 facing the spring 6. The extrusion groove 9 is a circular ring, and the lower end of the extrusion part 8 is connected to the extrusion groove 9. In the above technical solution, the extrusion groove 9 is provided on the sealing filler 4 to be connected with the extrusion part 8, which is more conducive to the sealing filler 4 being squeezed and deformed, and is more conducive to replenishing the wear of the sealing filler 4.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A stop valve with an elastic packing sealing structure, comprising a valve body, a valve stem connected to the valve body, a sealing packing arranged between the valve stem and the valve body, and a packing gland connected to the valve body, characterized in that: It also includes a spring, which is sleeved on the valve stem, and the two ends of the spring are respectively against the sealing packing and the packing cover; an annular pressing plate is provided between the spring and the sealing packing; a protruding extrusion portion is provided on the side of the pressing plate facing the sealing packing; the extrusion portion is annular, and the cross-section of the extrusion portion is V-shaped; the sealing packing is annular, and an extrusion groove corresponding to the extrusion portion is provided on the side of the sealing packing facing the spring, and the extrusion portion is connected to the extrusion groove.

2. A stop valve with an elastic packing sealing structure according to claim 1, characterized in that: The pressing sheet and the facing sheets of the sealing filler are spaced apart from each other.

3. The stop valve with elastic packing sealing structure according to claim 1, characterized in that: The spring is a conical spring with one end being larger and the other end being smaller, and the smaller end of the spring abuts against the packing gland.

4. The stop valve with elastic packing sealing structure according to claim 1, characterized in that: The valve body is provided with a connecting groove 1 for connecting a sealing filler, and the spring is connected in the connecting groove 1.

5. The stop valve with elastic packing sealing structure according to claim 1, characterized in that: The packing valve cover is provided with a second connecting groove for connecting a spring.

6. The stop valve with elastic packing sealing structure according to claim 1, characterized in that: The valve body and the packing gland are fixedly connected by screws, and the valve body and the packing gland are arranged at intervals.

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