A pipe clamp valve and a pipe clamping method

Abstract

The present invention relates to the technical field of pipe clamp valves, and specifically to a pipe clamp valve and a pipe clamp method, comprising: a valve body, a sleeve, a first clamping mechanism, a second clamping mechanism, and an extrusion mechanism; the sleeve is horizontally arranged in the valve body, and the first clamping mechanism, the extrusion mechanism and the second clamping mechanism are arranged in the valve body in sequence and at intervals; the present invention removes particles that may remain in the clamping part of the pipe clamp valve through the cooperation of the first clamping mechanism, the second clamping mechanism and the extrusion mechanism, thereby avoiding the possibility that particles may be clamped in the clamping part, resulting in the sleeve being blocked from closing and not sealing tightly, thereby affecting the sealing effect of the pipe clamp valve; at the same time, it also avoids the phenomenon that particles are clamped in the clamping part of the sleeve for a long time, resulting in permanent deformation of the contact part between the sleeve and the particles, thereby damaging the sleeve.

Description

Technical Field

[0001] The invention relates to the field of valves, and in particular to a pipe clamp valve for controlling the flow of a medium on a pipeline suitable for conveying ore pulp, abrasives, and micro-granular dry and wet dust slurries. Background Art

[0002] At present, the pipe clamp valve is suitable for conveying ore slurry, abrasive, micro-granular dry and wet dust slurry, etc., and is an opening and closing mechanism for controlling the flow of general corrosive media with an operating temperature of ≤80℃.

[0003] Chinese patent application number 201210238315.0 discloses a pneumatic pipe clamp valve, which includes a valve body 1, a pneumatic assembly, and a clamping assembly. The valve body 1 is provided with a sleeve 2 as a medium flow channel, the pneumatic assembly is arranged on the valve body 1, and the clamping assembly is arranged in the valve body 1 and connected to the pneumatic assembly. The clamping assembly is controlled by the pneumatic assembly to clamp or loosen the sleeve 2.

[0004] The clamping assembly in the Chinese patent with the application number 201210238315.0 has a small valve stem that descends and a large valve stem that rises, driving the upper pressure rod 6 and the lower pressure rod 7 to move relative to each other, clamping the sleeve 2, and thus closing the valve. Although this clamping assembly has a faster closing speed, the structure is a direct clamping type. When conveying granular media, particles may be clamped at the clamping position, causing the sleeve 2 to be blocked from closing and not tightly sealed, thereby affecting the sealing effect of the pipe clamp valve; in addition, when particles are clamped at the clamping position of the sleeve 2 for a long time, the contact portion between the sleeve 2 and the particles will be permanently deformed, thereby damaging the sleeve 2.

[0005] Another Japanese device with the publication number JP1991019174U disclosed "a valve" that pushes the roller through the cylinder to facilitate the extrusion of the tube, and simultaneously pushes the roller to the medium-free section in the tube, thereby reducing the particles in the medium in the tube from being clamped, and avoiding damage to the tube. The medium-free section in the tube mentioned here is the medium-free section formed by the flow of the medium at the rear end of the clamping part after the front end of the tube is clamped, but because the front end is intercepted, the flow rate of the medium is reduced, resulting in the particles in the medium may not move out of the medium-free section with the medium, but attached to the inner wall of the tube in the medium-free section; ultimately, when the roller is pushed to the medium-free section in the tube, the particles may still be clamped at the clamping part of the tube. Summary of the invention

[0006] Therefore, the present invention is made in view of the above problems. The purpose of the present invention is to use the cooperation of the guide wheel, the slider and the return spring to push the clamping assembly to move toward the end of the tube without the medium material, so as to solve the problem of particles being clamped. The present invention achieves the above purpose through the following technical solutions:

[0007] A pipe clamp valve and a pipe clamping method, comprising: a valve body, a sleeve, a first clamping mechanism, a second clamping mechanism, and a squeezing mechanism;

[0008] The front and rear ends of the valve body are both provided with flanges for connecting to pipelines, and the sleeve is horizontally arranged in the valve body, and both ends of the sleeve extend to the outward ports of the flanges at the front and rear ends of the valve body;

[0009] Along the medium flow direction, the first clamping mechanism, the extrusion mechanism and the second clamping mechanism are sequentially arranged in the valve body at intervals, and the first clamping mechanism and the second clamping mechanism have the same structure and are both arranged around the outer side of the sleeve;

[0010] First, the first clamping mechanism clamps the sleeve to cut off the flow of the medium at the first clamping mechanism position;

[0011] Subsequently, the second clamping mechanism clamps the sleeve and leaves a gap in the sleeve;

[0012] At this time, the sleeve between the first clamping mechanism and the second clamping mechanism forms a cavity without medium. The pressing plate of the extrusion mechanism quickly presses down the cavity, and the gas in the cavity is compressed to form a high-speed airflow, which rushes out from the gap in the sleeve left by the second clamping mechanism. When the high-speed airflow passes through, it will take away the particles remaining on the inner wall of the sleeve that is not completely clamped;

[0013] Subsequently, the second clamping mechanism completely clamps the sleeve;

[0014] Finally, the first clamping mechanism is released and reset, so that the medium is cut off when it flows to the second clamping mechanism.

[0015] The beneficial effects of the present invention are as follows:

[0016] Through the cooperation of the first clamping mechanism, the second clamping mechanism and the extrusion mechanism, the particles that may remain in the clamping part of the tube clamp valve are removed, thereby avoiding the phenomenon that particles may be clamped in the clamping part, resulting in the sleeve being blocked from closing and the sealing being poor, thereby affecting the sealing effect of the tube clamp valve; at the same time, it also avoids the phenomenon that particles are clamped in the clamping part of the sleeve for a long time, resulting in permanent deformation of the contact part between the sleeve and the particles, thereby damaging the sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an overall schematic diagram of the present invention.

[0018] Figure 2 This is a schematic diagram of the structure after the valve body is removed in the present invention.

[0019] Figure 3 This is a schematic diagram of the initial state of the pipe clamp valve in the present invention.

[0020] Figure 4This is a schematic diagram of the present invention when the first clamping mechanism clamps the sleeve and the second clamping mechanism does not completely clamp the sleeve.

[0021] Figure 5 This is a schematic diagram of the present invention, in which the first clamping mechanism clamps the sleeve, the second clamping mechanism does not completely clamp the sleeve, and the extrusion mechanism is pressed downward.

[0022] Figure 6 This is a schematic diagram of the first clamping mechanism and the second clamping mechanism clamping the sleeve simultaneously in the present invention.

[0023] Figure 7 This is a schematic diagram of the first clamping mechanism being reset and the second clamping mechanism clamping the sleeve in the present invention.

[0024] Figure markings: 1-valve body; 2-sleeve; 3-first clamping mechanism; 4-second clamping mechanism; 5-extrusion mechanism; 6-upper pressure rod; 7-lower pressure rod; 8-transmission assembly; 9-drive assembly; 11-top cover; 12-flange; 21-flange; 51-pressure plate; 52-slide rod; 81-rack group; 91-screw; 92-rotating handle; 811-upper rack; 812-lower rack; 813-gear; 100-medium flow direction; 200-high-speed airflow direction. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that it is easy for a person skilled in the art to implement these embodiments. However, the present invention may be implemented in various forms, and therefore the present invention is not limited to the embodiments described below. In addition, in order to more clearly describe the present invention, parts that are not connected to the present invention will be omitted from the accompanying drawings.

[0026] like Figure 1 , Figure 2 As shown, a pipe clamp valve and a pipe clamping method include: a valve body 1, a sleeve 2, a first clamping mechanism 3, a second clamping mechanism 4, and a squeezing mechanism 5;

[0027] The valve body 1 is a box structure with an opening upward, and the upper end of the valve body 1 is provided with a top cover 11 fixed by bolts. Both the front and rear ends of the valve body 1 are provided with flanges 12 for connecting with pipelines. The sleeve 2 is horizontally arranged in the valve body 1, and both ends of the sleeve 2 extend to the outward ports of the flanges 12 at the front and rear ends of the valve body 1. Both ends of the sleeve 2 have flanges 21 facing outward, and are clamped in the annular clamping grooves opened at the outward ports of the flanges 12 at the front and rear ends of the valve body 1 through the flanges 21;

[0028] Along the medium flow direction, the first clamping mechanism 3, the extrusion mechanism 5 and the second clamping mechanism 4 are sequentially arranged in the valve body 1 at intervals. The first clamping mechanism 3 and the second clamping mechanism 4 have the same structure and are both arranged around the outer side of the sleeve 2. The extrusion mechanism 5 is located above the sleeve 2.

[0029] like Figure 1 , Figure 2 As shown, the first clamping mechanism 3 and the second clamping mechanism 4 are both composed of an upper pressure rod 6, a lower pressure rod 7, a transmission assembly 8 and a drive assembly 9; the upper pressure rod 6 is located on the upper side of the sleeve 2, the lower pressure rod 7 is located on the lower side of the sleeve 2, the transmission assembly 8 is two rack groups 81, the two rack groups 81 are respectively located on both sides of the sleeve 2, the two ends of the upper pressure rod 6 and the lower pressure rod 7 are respectively connected to the two rack groups 81, the drive assembly 9 is composed of a screw rod 91 and a rotating handle 92, the lower end of the screw rod 91 is connected to the upper pressure rod 6 through a shaft sleeve, the upper end of the screw rod 91 passes through the top cover and extends vertically upward, the rotating handle 92 is located at the upper end of the top cover 11, and is sleeved on the screw rod 91;

[0030] like Figure 2 As shown, the extrusion mechanism 5 is composed of a pressing plate 51 and a sliding rod 52. The pressing plate 51 is located on the upper side of the sleeve 2. The lower end of the sliding rod 52 is fixed at the center of the upper end of the pressing plate 51. The upper end of the sliding rod 52 passes through the top cover 11 and extends vertically upward. A handle is provided at the top end of the sliding rod 52.

[0031] like Figure 2 As shown, the rack assembly 81 is composed of an upper rack 811, a lower rack 812 and a gear 813. The upper rack 811 is composed of two single-sided racks arranged relatively spaced apart. The upper end of the upper rack 811 is fixed to one end of the upper pressure rod 6 through a mounting block and extends vertically downward. The lower rack 812 is a double-sided rack. The lower end of the lower rack 812 is fixed to one end of the lower pressure rod 7 through a mounting block and extends vertically upward to between the two single-sided racks of the upper rack 811. There are four gears 813. The four gears 813 are arranged on the inner wall of the valve body 1 through a shaft sleeve, and are arranged in pairs in the gap between the upper rack 811 and the lower rack 812, and mesh with the upper rack 811 and the lower rack 812 respectively. The smooth surfaces of the upper rack 811 and the lower rack 812 facing the inner walls at both sides of the valve body 1 are in abutment with the inner walls at both sides of the valve body 1, and the smooth surfaces of the two single-sided racks of the upper rack 811 that are away from each other are in abutment with the limit blocks (not shown in the figure) provided on the inner walls at both ends and the inner walls at both sides of the valve body 1 respectively.

[0032] In this technical solution, the method of clamping the pipe is achieved by the following steps:

[0033] 1. If Figure 4As shown, the driving assembly 9 of the first clamping mechanism 3 drives the upper pressure rod 6 to move downward, and the upper pressure rod 6 drives the lower pressure rod 7 to move upward through the rack assembly 81. The relative movement of the upper pressure rod 6 and the lower pressure rod 7 causes the sleeve 2 located between the upper pressure rod 6 and the lower pressure rod 7 of the first clamping mechanism 3 to be clamped, and the medium flow is cut off at the first clamping mechanism 3.

[0034] 2. Then, if Figure 4 As shown, the upper pressing rod 6 of the second clamping mechanism 4 moves downward and the lower pressing rod 7 moves upward, and the sleeve 2 located between the upper pressing rod 6 and the lower pressing rod 7 of the second clamping mechanism 4 is clamped, but it is paused before the sleeve 2 is completely clamped, so that a gap is left between the inner walls of the sleeve 2 that are not completely clamped;

[0035] 3. At this time, if Figure 4 , Figure 5 As shown, the sleeve 2 between the first clamping mechanism 3 and the second clamping mechanism 4 forms a cavity without medium, and the pressing plate 51 of the extrusion mechanism 5 quickly presses down the cavity, and the gas in the cavity is compressed to form a high-speed airflow, which rushes out from the gap between the inner wall of the sleeve 2 that is not completely clamped between the upper pressing rod 6 and the lower pressing rod 7 of the second clamping mechanism 4. When the high-speed airflow passes through, it will take away the particles remaining on the inner wall of the sleeve 2 that is not completely clamped;

[0036] 4. If Figure 6 As shown, the sleeve 2 between the upper pressing rod 6 and the lower pressing rod 7 of the second clamping mechanism 4 is then completely clamped, so that the pipe clamp valve is closed;

[0037] 5. Then, if Figure 7 As shown, the first clamping mechanism 3 is released and reset, so that the medium is blocked when flowing to the second clamping mechanism 4.

[0038] In the technical solution, the first clamping mechanism 3, the second clamping mechanism 4 and the extrusion mechanism 5 cooperate with each other to remove the particles that may remain in the clamping part of the pipe clamp valve, thereby preventing the particles from being clamped in the clamping part, causing the sleeve 2 to be blocked from closing and not tightly sealed, thereby affecting the sealing effect of the pipe clamp valve. Furthermore, it also prevents the particles from being clamped in the clamping part of the sleeve 2 for a long time, causing permanent deformation of the contact part between the sleeve 2 and the particles, thereby damaging the sleeve 2.

Claims

1. A pipe clamping method, implemented by using the following pipe clamping valve, the pipe clamping valve comprising: Valve body (1), sleeve (2), first clamping mechanism (3), second clamping mechanism (4), and extrusion mechanism (5); The valve body (1) is a box structure, a top cover (11) is provided on the valve body (1), flanges (12) are provided at both the front and rear ends of the valve body (1), the sleeve (2) is horizontally arranged in the valve body (1), and both ends of the sleeve (2) extend to the outward ports of the flanges (12) at the front and rear ends of the valve body (1); Features: The first clamping mechanism (3), the extrusion mechanism (5) and the second clamping mechanism (4) are arranged at intervals in the valve body (1); the first clamping mechanism (3) and the second clamping mechanism (4) have the same structure and are arranged around the outside of the sleeve (2); the extrusion mechanism (5) is located above the sleeve (2) and between the first clamping mechanism (3) and the second clamping mechanism (4); The first clamping mechanism (3) and the second clamping mechanism (4) are both composed of an upper pressure rod (6), a lower pressure rod (7), a transmission assembly (8) and a drive assembly (9); the upper pressure rod (6) is located on the upper side of the sleeve (2), the lower pressure rod (7) is located on the lower side of the sleeve (2), the transmission assembly (8) is two rack groups (81), the two rack groups (81) are respectively located on both sides of the sleeve (2), the two ends of the upper pressure rod (6) and the lower pressure rod (7) are respectively connected to the upper end and the lower end of the two rack groups (81), the drive assembly (9) is composed of a screw rod (91) and a rotating handle (92), the lower end of the screw rod (91) is connected to the upper pressure rod (6) through a shaft sleeve, the upper end of the screw rod (91) passes through the top cover and extends vertically upward, the rotating handle (92) is located at the upper end of the top cover (11) and is sleeved on the screw rod (91); The squeezing mechanism (5) is composed of a pressing plate (51) and a sliding rod (52), wherein the pressing plate (51) is located on the upper side of the sleeve (2), the lower end of the sliding rod (52) is fixed at the center of the upper end of the pressing plate (51), the upper end of the sliding rod (52) passes through the top cover (11) and extends vertically upward, and a handle is provided at the top end of the sliding rod (52); The rack assembly (81) is composed of an upper rack (811), a lower rack (812) and a gear (813); the upper rack (811) is composed of two single-sided racks arranged at a relative interval; the upper end of the upper rack (811) is fixed to one end of the upper pressure rod (6) through a mounting block and extends vertically downward; the lower rack (812) is a double-sided rack; the lower end of the lower rack (812) is fixed to one end of the lower pressure rod (7) through a mounting block and extends vertically upward to between the two single-sided racks of the upper rack (811); four gears (813) are provided; the four gears (813) are arranged on the inner wall of the valve body (1) through a shaft sleeve; the four gears (813) are arranged in pairs in a gap between the upper rack (811) and the lower rack (812), and respectively mesh with the upper rack (811) and the lower rack (812); The pipe clamping method comprises the following steps: S1: The driving assembly (9) of the first clamping mechanism (3) drives the upper pressure rod (6) to move downward, and the upper pressure rod (6) drives the lower pressure rod (7) to move upward via the rack assembly (81). The relative movement of the upper pressure rod (6) and the lower pressure rod (7) causes the sleeve (2) located between the upper pressure rod (6) and the lower pressure rod (7) of the first clamping mechanism (3) to be clamped; S2: the upper pressure rod (6) of the second clamping mechanism (4) moves downward and the lower pressure rod (7) moves upward, thereby clamping the sleeve (2) between the upper pressure rod (6) and the lower pressure rod (7) of the second clamping mechanism (4), but not completely clamping; S3: The pressing plate (51) of the pressing mechanism (5) quickly presses down the sleeve (2); S4: the sleeve (2) between the upper pressing rod (6) and the lower pressing rod (7) of the second clamping mechanism (4) is completely clamped; S5: The first clamping mechanism (3) is released and reset.

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