Wear-resistant valve sleeve structure of pipe clamp valve and pipe clamp valve

Abstract

The utility model relates to the technical field of pipe clamp valves, and discloses a wear-resistant valve sleeve structure of a pipe clamp valve and the pipe clamp valve, the wear-resistant valve sleeve comprises a wear-resistant layer, a reinforcing layer and a protective layer, the wear-resistant layer is made of natural rubber materials, the reinforcing layer is formed by thickening the wear-resistant layer on the basis of original materials, and the protective layer is made of a rubber material. The reinforcing layer is located on the outer side of the wear-resistant layer and concentrated in the middle of the outer side of the wear-resistant layer, and the protective layer is located on the outer side of the reinforcing layer; by arranging the reinforcing layer, the anti-pressure capability of the valve sleeve can be effectively enhanced, and the valve sleeve is more suitable for working under the high-pressure working condition. Due to the existence of the reinforcing layer, the service life of the valve sleeve can be effectively prolonged on the aspect of coping with medium erosive wear of the valve sleeve. The reinforcing layer is concentrated at the middle action point position of the outer side of the wear-resistant layer instead of adopting a whole body thickening process, so that the manufacturing cost is reduced, and the problem that the flange and the body are torn in the compression process of the valve sleeve due to the fact that the tensile force of a rubber pipe is reduced in the traditional whole body thickening process is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe clamp valves, in particular to a wear-resistant valve sleeve structure of a pipe clamp valve and a pipe clamp valve. Background Art

[0002] The pipe clamp valve mainly relies on controlling the opening and closing of the valve core to realize the opening and closing of the valve. It is a section of rubber or plastic elastomer pipe, plus an adjustable metal clamp. The driving force is used to push the clamp to complete the extrusion of the sleeve, thereby achieving sealing. The rubber or plastic elastomer pipe is usually called a valve sleeve. In the mining field, in order to extend its service life, the valve sleeve structure is usually made of natural rubber with wear-resistant and anti-scouring properties, which is called a wear-resistant valve sleeve. The medium flow can be cut off or adjusted by flattening the valve sleeve, so the pipe clamp valve is suitable for mortar and tailings fluid media in the mining industry. Due to the very complex and harsh working conditions in the mine, the following problems often exist in the use of the pipe clamp valve: when the upper and lower pressure rods in the middle of the valve body move, the center of the valve sleeve is squeezed up and down, so that the flow of the pipe clamp valve increases or decreases or is shut off. When the valve sleeve is squeezed, the flow direction of the fluid in the pipeline will change, and a vortex will be formed at the position where the flow direction changes. The vortex can easily cause wear and breakage of the valve sleeve.

[0003] According to statistics, more than 90% of valve sleeve damage is concentrated near the pressure rod, and the rest of the parts are less worn. Usually, the valve sleeve is made of materials with equal thickness within the entire length range. If the valve sleeve is to be thickened throughout, it will undoubtedly increase costs and waste. For example, the wear-resistant and corrosion-resistant pipe clamp valve disclosed in the authorization announcement number CN207921380U, the elastic sleeve includes an anti-corrosion and wear-resistant layer, a reinforcement layer, and a protective layer arranged from the inside to the outside, which protects the valve sleeve, improves the wear and corrosion resistance of the elastic sleeve, and strengthens the pressure resistance of the valve sleeve. As well as the rubber tube clamp valve disclosed in application publication number CN103016779A, flanges are integrally formed at both ends of the composite rubber tube body, the composite rubber tube body comprises an outer wear-resistant and aging-resistant rubber layer, an intermediate high-strength fiber layer, and an inner wear-resistant and corrosion-resistant rubber layer, and the intermediate high-strength fiber layer is arranged between the outer wear-resistant and aging-resistant rubber layer and the inner wear-resistant and corrosion-resistant rubber layer; after the valve sleeve of the above two schemes is thickened throughout, the valve sleeve will also become harder, and the tensile elasticity and deformation ability of the valve sleeve will decrease. When the valve sleeve is compressed by the upper and lower pressure rods, it is very easy to cause tearing at the connection between the valve sleeve flange and the valve sleeve pipe. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a wear-resistant valve sleeve structure and a pipe clamp valve, which adds a concentrated reinforcement layer and reduces the manufacturing cost of the valve sleeve with the same life and quality. It also avoids the problem of the flange and the body of the valve sleeve being torn during the compression process due to the reduced tensile force of the hose caused by the traditional full-body thickening process.

[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] In a first aspect, a wear-resistant valve sleeve structure of a pipe clamp valve is provided, wherein the wear-resistant valve sleeve comprises a wear-resistant layer, a reinforcement layer and a protective layer, wherein the wear-resistant layer is made of natural rubber material, the reinforcement layer is formed by thickening the wear-resistant layer on the basis of the original material, the reinforcement layer is located on the outside of the wear-resistant layer and concentrated in the middle position of the outside of the wear-resistant layer, the protective layer is located on the outside of the reinforcement layer, and the length of the wear-resistant layer is greater than the length of the reinforcement layer.

[0007] As a further implementation, rubber flanges are provided at both ends of the wear-resistant layer.

[0008] As a further implementation, the distance from the reinforcement layer to the rubber flange is half the length of the reinforcement layer.

[0009] As a further implementation, the end of the reinforcement layer smoothly transitions to the wear-resistant layer.

[0010] As a further implementation method, the wear-resistant layer is bonded and cured by natural rubber using a cold bonding process.

[0011] As a further implementation, the thickness of the reinforcement layer is between 5-30 mm.

[0012] As a further implementation, the length of the reinforcement layer is between 50-300 mm.

[0013] As a further implementation, the protective layer is made of adhesive tape material.

[0014] As a further implementation manner, the protective layer covers the entire reinforcement layer.

[0015] In a second aspect, a pipe clamp valve comprises a pipe clamp valve wear-resistant valve sleeve structure as described above, a clamp is provided on the outside of the pipe clamp valve wear-resistant valve sleeve structure, the output end of the clamp is a pipe clamp valve actuating rod, and the pipe clamp valve actuating rod acts vertically at the middle position of the reinforcement layer.

[0016] The beneficial effects of the above utility model are as follows:

[0017] The reinforcing layer of the wear-resistant valve sleeve of the utility model will significantly improve the wear resistance and service life; at the same time, the reinforcing layer added in a centralized manner also reduces the manufacturing cost of the valve sleeve with the same service life and quality. It also avoids the problem of the flange and the body of the valve sleeve being torn during the compression process due to the reduced tensile force of the hose caused by the traditional full-body thickening process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0019] Figure 1 It is a schematic diagram of the overall structure of a wear-resistant valve sleeve structure of a pipe clamp valve in an embodiment of the utility model.

[0020] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0021] Among them: 1. wear-resistant layer, 2. reinforcement layer, 3. protective layer, 4. rubber flange, 5. pipe clamp valve operating rod. DETAILED DESCRIPTION

[0022] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0023] As mentioned in the prior art, in order to improve the wear resistance of the valve sleeve, if the valve sleeve is thickened throughout, the valve sleeve will become harder as a whole, and the tensile elasticity and deformation capacity of the valve sleeve will decrease. When the valve sleeve is compressed by the upper and lower pressure rods, although the wear resistance of the valve sleeve is improved, due to the decrease in its deformation capacity, it is easy to cause tearing at the connection between the flange and the end of the valve sleeve.

[0024] Embodiment 1

[0025] In a typical implementation of the present invention, reference is made to Figure 1 As shown, a wear-resistant valve sleeve structure of a pipe clamp valve includes a wear-resistant valve sleeve including a wear-resistant layer 1, a reinforcement layer 2 and a protective layer 3, wherein the wear-resistant layer 1 is made of natural rubber 1 material, the reinforcement layer 2 is formed by thickening the wear-resistant layer 1 on the basis of the original material, the reinforcement layer 2 is located on the outside of the wear-resistant layer 1 and concentrated in the middle position of the outside of the wear-resistant layer, the protective layer 3 is located on the outside of the reinforcement layer 2, and the length of the wear-resistant layer 1 is greater than the length of the reinforcement layer 2.

[0026] like Figure 1 As shown, the wear-resistant layer 1, the reinforcement layer 2 and the protective layer 3 are arranged in sequence from the inside to the outside, wherein the wear-resistant layer 1 and the reinforcement layer 2 are made of the same material, both made of natural rubber material. Rubber flanges 4 are arranged at both ends of the wear-resistant layer 1, and the material of the rubber flange 4 is the same as that of the wear-resistant layer, and the rubber flange 4 and the wear-resistant layer 1 are an integral structure.

[0027] The wear-resistant valve sleeve structure of this embodiment includes a natural rubber wear-resistant layer 1 on the inner side of the valve sleeve, a reinforcement layer 2 in the middle, and a heat-sealed layer (protective layer 3) of adhesive tape material on the outer side. In order to improve the wear resistance of the valve sleeve and ensure the deformation capacity of the valve sleeve, the reinforcement layer 2 of this embodiment is located on the outer side of the wear-resistant layer 1 and concentrated in the middle position of the outer side of the wear-resistant layer 1, that is, the length of the wear-resistant layer 1 is greater than the length of the reinforcement layer 2.

[0028] When the pipe clamp valve clamps the valve sleeve under the action of power, since the end of the wear-resistant layer 1 has only one layer of structure and is not thickened, it has good deformation ability. Therefore, when the valve sleeve is closed, the risk of tearing at the connection between the rubber flange 4 and the end of the valve sleeve pipe is reduced. At the same time, since the middle position of the outer side of the wear-resistant layer 1 is thickened as the reinforcement layer 2, the strength of the valve sleeve is guaranteed.

[0029] In this embodiment, the length of the reinforcing layer 2 needs to be greater than the length of the action surface of the clamp valve action rod 5 , and the clamp valve action rod 5 acts vertically on the middle position of the reinforcing layer 2 .

[0030] In a preferred example, the distance from the reinforcement layer 2 to the rubber flange 4 is half the length of the reinforcement layer 2 .

[0031] The end of the reinforcing layer 2 of this embodiment smoothly transitions to the wear-resistant layer 1. The thickness of the reinforcing layer is between 5-30 mm, preferably 15 mm. The length of the reinforcing layer 2 is between 50-300 mm, and the specific length is determined by the length of the wear-resistant layer 1 between the two rubber flanges.

[0032] The wear-resistant layer 1 is made of natural rubber 1 bonded and cured by cold bonding process. The reinforcement layer 2 is made of rubber material thickened on the original basis to improve the strength and life of the valve sleeve during repeated extrusion in the pipe clamp valve. In order to better protect the valve sleeve, a protective layer 3 is added to the outside of the reinforcement layer 2. The protective layer 3 is made of adhesive tape and ensures that the protective layer 3 covers the entire reinforcement layer 2. The adhesive tape can be selected from a wrapping tape.

[0033] Specifically, after the hot melt adhesive is applied to the outer tape material, the reinforcing layer 2 is pressed and cured by roller pressing. Then, a thermal bonding molding machine is used to heat the wear-resistant layer 1, the reinforcing layer 2, and the tape material for secondary curing. The curing time is 2-5 days.

[0034] The outer diameter of the processed wear-resistant valve sleeve is obviously larger than that of the existing valve sleeve of the same nominal diameter, with higher strength and limited weakening of deformation capacity. The deformation capacity of the connection between the end of the wear-resistant layer 1 and the rubber flange remains basically unchanged. Figure 1 As shown, the clamp valve actuating rod 5 applies the power source from the valve body to the valve sleeve, which has the effect of squeezing or loosening the valve sleeve.

[0035] The wear-resistant valve sleeve is installed on the pipe clamp valve. Under the action of the pipe clamp valve action rod 5, when the pipe clamp valve is in the closed state, the valve sleeve is completely flattened. At this time, the valve sleeve bears the maximum external pressure, which reduces its service life and wear resistance. By setting a reinforcement layer, the pressure resistance of the valve sleeve can be effectively enhanced, making it more suitable for working in high-pressure conditions.

[0036] Due to the presence of the reinforcement layer, the service life of the valve sleeve can be effectively extended in terms of dealing with the wear of the valve sleeve by the medium erosion. The reinforcement layer does not adopt the whole body thickening process, but is concentrated at the middle action point outside the wear-resistant layer 1, which reduces the cost and avoids the problem of the flange and body of the valve sleeve being torn during the compression process due to the reduced tensile force of the hose caused by the traditional whole body thickening process.

[0037] Embodiment 2

[0038] In a typical implementation of the present invention, reference is made to Figure 1 As shown, a pipe clamp valve includes the pipe clamp valve wear-resistant valve sleeve structure described in Example 1, and a clamp is provided on the outside of the pipe clamp valve wear-resistant valve sleeve structure. The output end of the clamp is a pipe clamp valve actuating rod 5, and two pipe clamp valve actuating rods 5 act vertically at the middle position of the reinforcement layer 2.

[0039] It should be noted that the clamp, the pipe clamp valve actuating rod 5 and the rubber flange 4 of this embodiment are all existing technologies of the pipe clamp valve in this field, and there is no need to describe their structures in detail here.

[0040] The pipe clamp valve action rod 5 acts on the reinforced wear-resistant valve sleeve. When it is about to be completely shut off or about to move from the fully closed state to the open state, the flow rate of the circulating medium is relatively accelerated, and the scouring and wear of the valve sleeve will be strengthened. Compared with the valve sleeve without a reinforcement layer or the reinforcement layer is not thickened, the wear-resistant valve sleeve of the utility model will significantly improve the wear resistance and service life; at the same time, the reinforcement layer 2 added in a concentrated form also reduces the manufacturing cost of the valve sleeve with the same service life and quality. It also avoids the problem of the flange and the body of the valve sleeve being torn during the compression process due to the reduced tensile force of the hose caused by the traditional full-body thickening process.

[0041] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. 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 wear-resistant valve sleeve structure of a pipe clamp valve, characterized in that: The wear-resistant valve sleeve includes a wear-resistant layer, a reinforcement layer and a protective layer, wherein the wear-resistant layer is made of natural rubber material, the reinforcement layer is formed by thickening the wear-resistant layer on the basis of the original material, the reinforcement layer is located on the outside of the wear-resistant layer and concentrated in the middle position of the outside of the wear-resistant layer, the protective layer is located on the outside of the reinforcement layer, and the length of the wear-resistant layer is greater than the length of the reinforcement layer.

2. The wear-resistant valve sleeve structure of a pipe clamp valve according to claim 1, characterized in that: Rubber flanges are arranged at both ends of the wear-resistant layer.

3. The wear-resistant valve sleeve structure of a pipe clamp valve according to claim 2, characterized in that: The distance from the reinforcement layer to the rubber flange is half the length of the reinforcement layer.

4. The wear-resistant valve sleeve structure of a pipe clamp valve according to claim 1, characterized in that: The end of the reinforcement layer smoothly transitions to the wear-resistant layer.

5. The wear-resistant valve sleeve structure of a pipe clamp valve according to claim 1, characterized in that: The wear-resistant layer is bonded and cured by a cold bonding process with natural rubber.

6. The wear-resistant valve sleeve structure of a pipe clamp valve according to claim 1, characterized in that: The thickness of the reinforcement layer is between 5 and 30 mm.

7. A wear-resistant valve sleeve structure of a pipe clamp valve according to claim 1 or 6, characterized in that: The length of the reinforcement layer is between 50-300 mm.

8. The wear-resistant valve sleeve structure of a pipe clamp valve according to claim 1, characterized in that: The protective layer is made of adhesive tape material.

9. The wear-resistant valve sleeve structure of a pipe clamp valve according to claim 8, characterized in that: The protective layer covers the entire reinforcement layer.

10. A pipe clamp valve, characterized in that: The pipe clamp valve comprises a pipe clamp valve wear-resistant valve sleeve structure as described in any one of claims 1 to 9, a clamp is arranged on the outside of the pipe clamp valve wear-resistant valve sleeve structure, the output end of the clamp is a pipe clamp valve actuating rod, and the pipe clamp valve actuating rod acts vertically at the middle position of the reinforcement layer.

Images