Pressure relief straight-through type sealing stop valve

Abstract

The utility model discloses a pressure relief straight-through type sealing stop valve, and relates to the technical field of stop valves. The stop valve comprises a stop valve body, a sealing cover is fixed on the stop valve body through a bolt, a mounting seat is fixed on the sealing cover, a valve rod used for controlling the stop valve body to be opened and closed is in threaded connection in the mounting seat, a hand wheel is fixed at the top end of the valve rod, two connecting rods are fixed on the surface of the mounting seat, and a connecting ring is fixed between the two connecting rods. The connecting ring sleeves the surface of the valve rod, a nut is fixed in the connecting ring, and the valve rod is in threaded connection in the nut; by arranging the extrusion assembly, the valve rod cannot rotate due to the fact that the hand wheel is touched by mistake, and therefore the sealing performance and the fluid control precision of the stop valve are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of stop valve, especially involves the pressure relief straight through type sealed stop valve. BACKGROUND

[0002] In the industrial pipeline system, fluid control field and all kinds of occasions needing accurate control fluid on-off and flow, stop valve as a kind of key valve equipment, plays a vital role. Stop valve is rotated by valve stem to control the lift of valve, and then realizes the opening, closing and flow regulation of fluid passage.

[0003] However, in the actual application process, the traditional stop valve has some problems to be solved. On the one hand, when the stop valve completes the adjustment (such as opening to a certain degree or closing), the valve stem is usually directly exposed to the outside environment, which is easy to be disturbed by external factors. For example, in the industrial field, personnel may inadvertently touch the hand wheel, or the vibration of the surrounding equipment is transmitted to the valve stem, causing the valve stem to rotate. This accidental rotation will change the set state of the stop valve, so that the stop valve cannot maintain a stable opening or closing degree, thereby affecting its sealing performance.

[0004] In view of the above problems, the utility model file provides a pressure relief straight through type sealed stop valve. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a pressure relief straight through type sealed stop valve, which can be set by setting the extrusion assembly, so that the valve stem will not rotate due to accidental touch of the hand wheel, thereby improving the sealing performance and fluid control accuracy of the stop valve, and solving the existing technical problems.

[0006] To solve the above technical problems, the utility model is realized by the following technical scheme:

[0007] The pressure relief straight through type sealed stop valve comprises:

[0008] The stop valve body is fixed on the sealing cover by bolts, the sealing cover is fixed on the mounting seat, the mounting seat is threadedly connected with the valve stem for controlling the opening and closing of the stop valve body, the top end of the valve stem is fixed with a hand wheel, the surface of the mounting seat is fixed with two first connecting rods, the two first connecting rods are fixed with a connecting ring, the connecting ring is sleeved on the surface of the valve stem, the connecting ring is fixed with a nut, and the valve stem is threadedly connected in the nut.

[0009] A group of extrusion assemblies are arranged in the connecting ring, and the extrusion assemblies are used for positioning the valve stem to ensure the stability of the valve stem after adjustment.

[0010] In order to conveniently release the clamping and positioning of the valve rod after releasing the extrusion assembly, a reset assembly is arranged in the connecting ring, which is used to automatically release the positioning of the valve rod after releasing the extrusion.

[0011] Optionally, the extrusion assembly comprises two accommodating grooves arranged in the connecting ring, two arc-shaped clamping plates are arranged in the two accommodating grooves, the distal ends of the two arc-shaped clamping plates are fixedly connected with second connecting rods, two first recesses are arranged on the surface of the connecting ring, the two second connecting rods are respectively outwardly and movably penetrated into the two first recesses, and two trapezoidal extrusion blocks are slidably arranged in the two first recesses.

[0012] Optionally, the extrusion assembly further comprises external threads arranged on the surface of the connecting ring, and an extrusion threaded ring is threadedly connected with the surface of the connecting ring, the bottom end of the extrusion threaded ring is in extrusion contact with the inclined surfaces of the two trapezoidal extrusion blocks, and a screw ring is fixedly arranged on the surface of the extrusion threaded ring.

[0013] When the screw ring is rotated by rotating the screw ring, the extrusion threaded ring is relatively displaced downward when being threadedly rotated on the surface of the connecting ring, so as to extrude the inclined surfaces of the two trapezoidal extrusion blocks, and the two trapezoidal extrusion blocks are moved toward the direction of approaching and respectively enter the two first recesses, the two trapezoidal extrusion blocks push the two arc-shaped clamping plates to move toward the direction of approaching through the second connecting rods, so that the two arc-shaped clamping plates clamp and fix the surface of the valve rod, and the valve rod cannot be rotated due to accidental touch of the hand wheel.

[0014] Optionally, the arc-shaped surfaces of the two valve rods are provided with anti-skid pads.

[0015] Optionally, the reset assembly comprises two springs, the two springs are respectively fixedly connected with the two trapezoidal extrusion blocks, the two springs are respectively fixedly arranged in the two first recesses, and the two springs are respectively sleeved on the surfaces of the two second connecting rods.

[0016] When the extrusion threaded ring is moved upward, the two trapezoidal extrusion blocks can quickly leave the first recesses through the elastic pushing of the two springs, so as to drive the two arc-shaped clamping plates to return to the accommodating grooves to release the positioning of the arc-shaped clamping plates.

[0017] Optionally, the surface of the connecting ring is fixedly connected with two limiting rings, an accommodating gap is formed between the two limiting rings, and the extrusion threaded ring is arranged in the accommodating gap.

[0018] In the application, after rotating the valve rod, the extrusion threaded ring is driven to rotate by rotating the screw ring, and the extrusion threaded ring moves downward relative to the surface thread of the connecting ring, so that the inclined surfaces of the two trapezoidal extrusion blocks are extruded, and the two trapezoidal extrusion blocks move in the direction of approaching each other and enter the two first grooves respectively, and the two arc-shaped clamping plates are driven to move in the direction of approaching each other by the second connecting rod, so that the two arc-shaped clamping plates clamp and fix the surface of the valve rod, and the valve rod cannot rotate due to accidental touch of the hand wheel.

[0019] After the extrusion threaded ring moves upward, the two trapezoidal extrusion blocks can quickly leave the first grooves by the elastic pushing of the two springs, so that the two arc-shaped clamping plates return to the accommodating grooves to release the positioning of the arc-shaped clamping plates.

[0020] In the utility model, the pressure relief straight-through type sealing stop valve is provided with the extrusion assembly, so that the valve rod cannot rotate due to accidental touch of the hand wheel, and the sealing performance and fluid control precision of the stop valve are improved.

[0021] In the utility model, the pressure relief straight-through type sealing stop valve is provided with the reset assembly, after the extrusion threaded ring moves upward, the two trapezoidal extrusion blocks can quickly leave the first grooves by the elastic pushing of the two springs, so that the two arc-shaped clamping plates return to the accommodating grooves to release the positioning of the arc-shaped clamping plates, and the valve rod is convenient to adjust again.

[0022] Of course, implementing any product of the utility model does not necessarily need to achieve all the advantages mentioned above at the same time. DRAWINGS

[0023] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating laboriously.

[0024] Figure 1 It is the front view of the utility model in the embodiment;

[0025] Figure 2 It is the first partial sectional view of the utility model in the embodiment;

[0026] Figure 3 It is the second partial sectional view of the utility model in the embodiment; Figure 2 It is the local enlarged view of A in the embodiment;

[0027] Figure 4 It is the second partial sectional view of the utility model in the embodiment;

[0028] In the figure: 1, the valve body of the stop valve; 2, the sealing cover; 3, the mounting seat; 4, the connecting rod; 5, the connecting ring; 6, the valve rod; 8, the hand wheel; 9, the nut; 10, the limiting ring; 11, the extruded threaded ring; 12, the screw ring; 13, the trapezoidal extruded block; 14, the first groove; 15, the accommodating groove; 16, the arc-shaped clamping plate; 17, the connecting rod; 18, the spring. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0030] In the description of the utility model, it is understood that the terms 'opening', 'upper','middle', 'length', 'inner' and the like indicate the orientation or positional relationship, which are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated components or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0031] In order to keep the following description of the embodiments of the utility model clear and concise, the utility model omits the detailed description of known functions and known components.

[0032] Embodiment one

[0033] Please refer to Figures 1-4 As shown in the figure, in the embodiment, a pressure relief straight-through type sealing stop valve is provided, the stop valve body 1 is provided with a sealing cover 2 fixed through a bolt, the sealing cover 2 is fixed with a mounting seat 3, a valve rod 6 for controlling the opening and closing of the stop valve body 1 is threadedly connected in the mounting seat 3, the top end of the valve rod 6 is fixed with a hand wheel 8, the surface of the mounting seat 3 is fixed with two first connecting rods 4, a connecting ring 5 is fixed between the two first connecting rods 4, the connecting ring 5 is sleeved on the surface of the valve rod 6, a nut 9 is fixed in the connecting ring 5, and the valve rod 6 is threadedly connected in the nut 9;

[0034] A plurality of extrusion assemblies are arranged in the connecting ring 5, and the extrusion assemblies are used for positioning the valve stem 6 to ensure the stability of the valve stem 6 after adjustment. The extrusion assembly comprises two accommodating grooves 15 arranged in the connecting ring 5, and two arc-shaped clamping plates 16 are arranged in the two accommodating grooves 15. The distal ends of the two arc-shaped clamping plates 16 are fixedly connected with a second connecting rod 17. Two first recesses 14 are arranged on the surface of the connecting ring 5, and the two second connecting rods 17 are respectively outwardly and movably arranged in the two first recesses 14. Two trapezoidal extrusion blocks 13 are slidably arranged in the two first recesses 14, and the two second connecting rods 17 are respectively fixedly connected with the proximal ends of the two trapezoidal extrusion blocks 13.

[0035] The extrusion assembly further comprises external threads arranged on the surface of the connecting ring 5. An extrusion threaded ring 11 is threadedly connected with the surface of the connecting ring 5. The bottom end of the extrusion threaded ring 11 is in extrusion contact with the inclined surfaces of the two trapezoidal extrusion blocks 13. A screw ring 12 is fixedly arranged on the surface of the extrusion threaded ring 11. The screw ring 12 is rotated to drive the extrusion threaded ring 11 to rotate. When the extrusion threaded ring 11 is threadedly rotated on the surface of the connecting ring 5, the extrusion threaded ring 11 is relatively moved downward, so as to extrude the inclined surfaces of the two trapezoidal extrusion blocks 13, and the two trapezoidal extrusion blocks 13 are moved toward the proximal direction and respectively arranged in the two first recesses 14. The two trapezoidal extrusion blocks 13 drive the two arc-shaped clamping plates 16 to move toward the proximal direction through the second connecting rods 17, so that the two arc-shaped clamping plates 16 clamp and fix the surface of the valve stem 6, and the valve stem 6 cannot be rotated due to the accidental touch of the hand wheel 8.

[0036] The arc-shaped surfaces of the two valve stems 6 are provided with anti-skid pads to enhance the clamping effect. Two limiting rings 10 are fixedly arranged on the surface of the connecting ring 5, and an accommodating gap is formed between the two limiting rings 10. The extrusion threaded ring 11 is arranged in the accommodating gap to limit the axial movement range of the extrusion threaded ring 11.

[0037] Embodiment two

[0038] On the basis of the embodiment one, the following improvements are made: refer to the attached drawings Figure 1 -attached drawings Figure 4 In order to conveniently release the clamping and positioning of the valve stem 6 after the extrusion assembly is released, a plurality of reset assemblies are further arranged in the connecting ring 5. The reset assemblies are used for automatically releasing the positioning of the valve stem 6 after the extrusion is released. The reset assembly comprises two springs 18. The two springs 18 are respectively fixedly arranged on the proximal ends of the two trapezoidal extrusion blocks 13. The two springs 18 are respectively arranged in the two first recesses 14. The two springs 18 are respectively sleeved on the surfaces of the two second connecting rods 17. After the extrusion threaded ring 11 is moved upward, the two trapezoidal extrusion blocks 13 can quickly move away from the first recesses 14 through the elastic pushing of the two springs 18, so as to drive the two arc-shaped clamping plates 16 to return to the accommodating grooves 15 to release the positioning of the arc-shaped clamping plates 16.

[0039] It should be noted that in the description of the present specification, the description such as "first", "second" and the like is only used to distinguish various features, and does not have actual order or directional meaning, and the present application is not limited thereto.

[0040] The drawings in the specification of the present application are only of a schematic nature, and the size and shape of each component shown are not actual limitations, but only a schematic representation. In the actual implementation process, each component can be reasonably configured and adjusted according to specific needs and actual conditions.

[0041] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0042] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details, and the utility model is not limited to the specific embodiments described. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments in order to better explain the principles and practical application of the utility model, so that the skilled in the art can well understand and use the utility model. The utility model is limited by the claims and the entire scope and equivalents thereof.

Claims

1. A pressure relief in-line seal stop valve, characterized in that, The utility model relates to a kind of stop valve, including: Cut-off valve body (1), sealing cover (2) is fixed by bolt on the cut-off valve body (1), mounting seat (3) is fixed on the sealing cover (2), valve stem (6) for controlling the opening and closing of cut-off valve body (1) is threadedly connected in the mounting seat (3), the top of the valve stem (6) is fixed with hand wheel (8), the surface of the mounting seat (3) is fixed with two first connecting rods (4), connecting ring (5) is fixed between two first connecting rods (4), the connecting ring (5) is sleeved on the surface of valve stem (6), nut (9) is fixed in the connecting ring (5), the valve stem (6) is threadedly connected in the nut (9); A group of extrusion assemblies are arranged in the connecting ring (5), and the extrusion assemblies are used to position the valve stem (6) to ensure the stability of the valve stem (6) after adjustment. In order to conveniently release the clamping and positioning of the valve stem (6) after the extrusion assemblies are released, a group of reset assemblies are further arranged in the connecting ring (5), and the reset assemblies are used to automatically release the positioning of the valve stem (6) after the extrusion is released.

2. The pressure relief in-line seal stop valve as claimed in claim 1, wherein, The extrusion assemblies include two accommodating grooves (15) formed in the connecting ring (5), and two arc-shaped clamping plates (16) are arranged in the two accommodating grooves (15), respectively.

3. The pressure relief in-line seal stop valve of claim 2, wherein, The extrusion assemblies further include external threads formed on the surface of the connecting ring (5), and an extrusion threaded ring (11) is threadedly connected to the surface of the connecting ring (5), the bottom end of the extrusion threaded ring (11) is in extrusion contact with the inclined surfaces of the two trapezoidal extrusion blocks (13), and a twisting ring (12) is fixed to the surface of the extrusion threaded ring (11). When the twisting ring (12) is twisted to drive the extrusion threaded ring (11) to rotate, the extrusion threaded ring (11) is relatively displaced downward when threadedly rotating on the surface of the connecting ring (5), so as to extrude the inclined surfaces of the two trapezoidal extrusion blocks (13), and the two trapezoidal extrusion blocks (13) are moved toward each other and respectively enter the two first recesses (14), the two trapezoidal extrusion blocks (13) push the two arc-shaped clamping plates (16) to move toward each other through the second connecting rods (17), so that the two arc-shaped clamping plates (16) clamp and fix the surface of the valve stem (6), and the valve stem (6) cannot be rotated due to accidental touch of the hand wheel (8).

4. The pressure relief in-line seal stop valve as claimed in claim 3, wherein, The arc-shaped surfaces of the two valve stems (6) are provided with anti-skid pads.

5. The pressure relief in-line seal stop valve as claimed in claim 3, wherein, The reset assembly comprises two springs (18), the two springs (18) are fixed on the close ends of two trapezoidal extrusion blocks (13) respectively, the two springs (18) are fixed in two first grooves (14) respectively, and the two springs (18) are sleeved on the surfaces of two second connecting rods (17) respectively. Wherein, after the extrusion threaded ring (11) moves upward, the two trapezoidal extrusion blocks (13) can quickly leave the first grooves (14) by the elastic pushing of the two springs (18), so as to drive the two arc-shaped clamping plates (16) to return to the accommodating grooves (15) and release the positioning of the arc-shaped clamping plates (16).

6. The pressure relief in-line seal stop valve as claimed in claim 3, wherein, The surface of the connecting ring (5) is fixed with two limiting rings (10), an accommodating gap is formed between the two limiting rings (10), and the extrusion threaded ring (11) is located in the accommodating gap.

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