Portable chain tension detection device and detection method

Abstract

The invention belongs to the field of underground scraper chain detection and inspection, and particularly relates to a portable chain tension detection device and a detection method. Comprising two clamping devices which respectively clamp two ends of a measured chain; the two oil cylinders are symmetrically arranged between the two clamping devices; and the hydraulic system is used for supplying oil to the oil cylinder and measuring the driving force of the oil cylinder. According to the invention, the measurement of the tensioning force of the scraper chain of the underground coal mining machine is realized, simple and feasible inspection and detection equipment is provided for the tensioning of the scraper chain, and the problems of chain damage, chain wear and the like are reduced.

Description

Technical Field

[0001] The invention belongs to the field of underground scraper chain detection and testing, and specifically relates to a portable chain tension force detection device and a detection method. Background Art

[0002] Chains are commonly used mechanical equipment for underground operations, such as the transport chain of the tunnel boring machine, the transport chain of the coal mining machine scraper, and various underground lifting chains and fall chains. Chain transportation and chain transmission play an important role in underground operations. In chain transportation, the coal mining machine scraper chain has the largest transportation capacity, so the reliability of the scraper chain is particularly important. During the transportation of the scraper chain, if the chain is too tight, it is easy to cause the chain to break, and if the chain is too loose, it is easy to wear and jam the chain. Therefore, the scraper chain requires a certain tension to keep it in the best working condition. When the equipment is newly purchased, the chain tension is guaranteed by the manufacturer. As the equipment is used, the chain wears and deforms, resulting in insufficient chain tension. When the chain is loosened, which is visible to the naked eye, the chain has already been severely worn and the equipment is in a non-optimal working condition. Therefore, it is very necessary to design a portable chain tension detection device. Summary of the invention

[0003] In order to measure the tension of the scraper chain of an underground coal mining machine, the present invention provides a simple and feasible inspection and detection equipment for the tension of the scraper chain, reduces problems such as chain damage and chain wear, and provides a portable chain tension detection device.

[0004] The present invention adopts the following technical solution: a portable chain tension force detection device, comprising: Two clamping devices, the two clamping devices respectively clamp two ends of the measured chain; Two oil cylinders, the two oil cylinders are symmetrically arranged between the two clamping devices; A hydraulic system is used to supply oil to the cylinder and measure the driving force of the cylinder.

[0005] In some embodiments, the clamping device comprises: A left clamping device and a right clamping device, wherein the left clamping device and the right clamping device are symmetrically arranged on both sides to clamp the measured chain; In some embodiments, a bolt-nut connector is provided, wherein the bolt-nut connector connects the left clamping device and the right clamping device.

[0006] In some embodiments, the left clamping device includes: Left connector, The left hemispherical surface is arranged on the inner side of the left connecting seat, and a left arc groove and a left square groove are arranged on the inner side of the left hemispherical surface, and the left arc groove and the left square groove form a complete groove surface.

[0007] In some embodiments, the right clamping device includes: Right connector, The right hemispherical surface is arranged on the inner side of the right connecting seat, and a right arc groove and a right square groove are arranged on the inner side of the right hemispherical surface, and the right arc groove and the right square groove form a complete groove surface.

[0008] In some embodiments, the hydraulic system includes: A hydraulic pump, wherein the input end of the hydraulic pump is connected to the oil tank, and the output end of the hydraulic pump is connected to a three-way reversing ball valve; The three-way reversing ball valve is connected to two oil cylinders through an oil pipe, and a pressure gauge is installed on the oil pipe.

[0009] In some embodiments, a relief valve is provided between the input end of the hydraulic pump and the oil tank.

[0010] In some embodiments, a quick-connect connector is provided on the oil pipe for connecting two sections of the oil pipe.

[0011] A detection method for a portable chain tension detection device, comprising: Put the reversing ball valve into the non-operating state, at which time the pressure of the oil inlet 302 of the hydraulic cylinder 3 is zero; Manually increase the stroke of the two symmetrically arranged clamping devices, so that the complete groove surface formed by the left arc groove and the right arc groove of the clamping device contacts the A surface of the cross link I; The arc grooves of the symmetrically arranged clamping device and the complete groove surface formed by the right arc groove are brought into contact with the A surface of the transverse chain link II, and the rectangular groove formed by the left square groove and the right square groove cooperates with the gasket to position the longitudinal chain link so that it does not rotate; Switch the ball valve to the working state, and turn on the hydraulic pump to supply fluid to the system. Driven by the oil cylinder, the distance between the two clamping devices gradually decreases, and the A surface of the cross link I and the A surface of the cross link II are firmly in contact with the clamping device. When the tension F on both ends of the clamping device and the driving force of the oil cylinder are balanced, the system overflows through the overflow valve. The system pressure remains unchanged, and the driving force of the cylinder is calculated through the pressure gauge and the cylinder diameter and rod diameter. The driving force of the two cylinders is the tension on the measured chain.

[0012] F=2PS, F is the tension of the measured chain, P is the pressure of the pressure gauge, and S is the effective area of ​​the cylinder rod chamber.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The portable chain tension detection device of the present invention realizes the measurement of the tension of the scraper chain of an underground coal mining machine through the principle of mechanics and the use of special clamps, driving cylinders and hydraulic systems, provides a simple and feasible inspection and detection equipment for the tension of the scraper chain, and reduces problems such as chain damage and chain wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1This is an axonometric diagram of a portable chain tension force detection device; Figure 2 This is a system diagram of a portable chain tension force detection device; Figure 3 Figure 2 is a diagram of a clamping device; In the figure, 1-clamping device, 2-pin shaft, 3-oil cylinder, 4-tested chain, 5-hydraulic pump, 6-relief valve, 7-quick plug connector, 8-pressure gauge, 9-reversing ball valve, 10-oil pipe, 101-left clamping device, 102-gasket, 103-bolt and nut connector, 104-right clamping device, 10101-left connecting seat, 10102-left hemispherical surface, 10103-left arc groove, 10104-left square groove, 10401-right connecting seat, 10402-right hemispherical surface, 10403-right arc groove, 10404-right square groove, 302-oil inlet, 301-vent, 401-cross chain link I, 402-longitudinal chain link, 403-cross chain link II. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0016] like Figure 1-3 As shown, a portable chain tension force detection device comprises: Two clamping devices 1, the two clamping devices 1 clamp two ends of the measured chain 4 respectively; Two oil cylinders 3, the two oil cylinders 3 are symmetrically arranged between the two clamping devices 1; The hydraulic system is used to supply oil to the cylinder 3 and measure the driving force of the cylinder 3.

[0017] The clamping device 1 comprises: A left clamping device 101 and a right clamping device 104, wherein the left clamping device 101 and the right clamping device 104 are symmetrically arranged on both sides to clamp the measured chain 4; The bolt and nut connector 103 connects the left clamping device 101 and the right clamping device 104 .

[0018] The left clamping device 101 comprises: Left connector 10101, The left hemispherical surface 10102 is arranged on the inner side of the left connecting seat 10101, and a left arc groove 10103 and a left square groove 10104 are arranged on the inner side of the left hemispherical surface 10102, and the left arc groove 10103 and the left square groove 10104 form a complete groove surface.

[0019] The right clamping device 104 comprises: Right connector 10401, The right hemispherical surface 10402 is arranged on the inner side of the right connecting seat 10401, and a right arc groove 10403 and a right square groove 10404 are arranged on the inner side of the right hemispherical surface 10402, and the right arc groove 10403 and the right square groove 10404 form a complete groove surface.

[0020] The hydraulic system includes: A hydraulic pump 5, wherein the input end of the hydraulic pump 5 is connected to the oil tank, and the output end of the hydraulic pump 5 is connected to a three-way reversing ball valve 9; The three-way reversing ball valve 9 is connected to the two oil cylinders 3 through an oil pipe 10 , and a pressure gauge 8 is installed on the oil pipe 10 .

[0021] An overflow valve 6 is provided between the input end of the hydraulic pump 5 and the oil tank.

[0022] A quick-connect connector 7 is provided on the oil pipe 10 for connecting two sections of the oil pipe 10 .

[0023] The measured chain 4 is the entire scraper chain working chain, and the view selects a part of it, including the transverse chain link I 401, the longitudinal chain link 402, and the transverse chain link II 403. The force F in the view represents the tension generated by the remaining chain links on the measured chain. The chain tension force measuring device has a simple structure, is easy to carry and use, and has strong practicality. The main structure of the device is two holding devices 1 arranged symmetrically relative to the measured chain 4. The two clamping devices 1 form the main structure of the device through the pin 2 and the cylinder 3. The left clamping device 101 and the right clamping device 104 and the gasket 102 of the clamping device 1 are fixedly connected together by the bolt and nut connector 103, so that the left hemispherical surface 10102 of the left clamping device 101 and the right hemispherical surface 10402 of the right clamping device 104 form a spherical surface, and the left arc groove 10103 of the left clamping device 101 and the right arc groove 10403 of the right clamping device 104 form a complete groove surface, which can clamp the A surface of the cross link I 401 or the cross link II 403 without causing the cross link to be blocked. The chain links pass through, the left square groove 10104 of the left clamping device 101 and the right square groove 10404 of the right clamping device 104 form a rectangular groove, which allows the longitudinal chain link 402 to pass through and cooperates with the gasket 102 to clamp the longitudinal chain link 402. The left clamping device 101 is hinged through the left connecting seat 10101, the pin 2 and one end of the cylinder 3. The right clamping device 104 is hinged through the right connecting seat 10401, the pin 2 and one end of the cylinder 3 (the other one). The oil inlet 302 of the cylinder 3 is connected to the rod cavity, and the vent hole 3 of the cylinder 3 is connected to the rod cavity. 01 is connected to the rodless cavity; two symmetrically arranged clamping devices 1 form a test whole through the pin 2 and the cylinder 3, wherein the tested chain 4 (which can be selected according to the cylinder stroke, and 3 chain links are selected in this example) includes two transverse chain links and one longitudinal chain link, and the tested chain link 4 passes through the middle of the two clamping devices 1, and one of the holding devices 1 can clamp the A surface of the transverse chain link Ⅰ401 or the transverse chain link Ⅱ403 through the complete groove surface formed by the left arc groove 10103 and the right arc groove 10403 without allowing the transverse chain link to pass through, and at the same time, the left square groove 10 The rectangular groove formed by 104 and the right square groove 10404 cooperates with the gasket 102 to clamp the longitudinal link 402. Similarly, the symmetrically arranged clamping device 1 completes the A-side restriction of the transverse link Ⅰ401 or the transverse link Ⅱ403; the air vent 301 of the cylinder 3 is provided with a filtering device, and directly connects the rodless cavity of the cylinder 3 and the atmosphere, and the oil inlets 302 of the two cylinders 3 are connected to the system circuit through the oil pipe 10, and the system circuit is connected with a pressure gauge 8, a quick-connect connector 7, a three-way reversing ball valve 9, a hydraulic pump 5 and a relief valve 6.

[0024] A detection method for a portable chain tension detection device, comprising: Turn the reversing ball valve 9 to the non-operating state, at which time the pressure at the oil inlet 302 of the hydraulic cylinder 3 is zero; Manually increase the stroke of the two symmetrically arranged clamping devices 1, and at this time, the complete groove surface formed by the left arc groove 10103 and the right arc groove 10403 of the clamping device 1 contacts the A surface of the transverse chain link I401; The complete groove surface formed by the arc groove 10103 and the right arc groove 10403 of the symmetrically arranged clamping device 1 contacts the A surface of the transverse chain link II 403, and the rectangular groove formed by the left square groove 10104 and the right square groove 10404 cooperates with the gasket 102 to position the longitudinal chain link 402 so that it does not rotate; Switch the ball valve 9 to the working state, and turn on the hydraulic pump 5 to supply fluid to the system. Driven by the oil cylinder 3, the distance between the two clamping devices 1 gradually decreases, and the A surface of the cross link Ⅰ401 and the A surface of the cross link Ⅱ403 are firmly in contact with the clamping device 1. When the tension F on both ends of the clamping device and the driving force of the oil cylinder are balanced, the system overflows through the overflow valve 6. The system pressure remains unchanged, and the driving force of the cylinder 3 is calculated through the pressure gauge 8 and the cylinder diameter and rod diameter of the cylinder 3. The driving force of the two cylinders is the tension exerted on the measured chain 4.

[0025] F=2PS, F is the tension of the measured chain 4, P is the pressure of the pressure gauge, and S is the effective area of ​​the cylinder rod chamber.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the invention rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A portable chain tension detection device, characterized in that: include: Two clamping devices (1), the two clamping devices (1) respectively clamping two ends of the measured chain (4); Two oil cylinders (3), the two oil cylinders (3) being symmetrically arranged between the two clamping devices (1); A hydraulic system is provided, wherein the hydraulic system is used to supply oil to the oil cylinder (3) and to measure the driving force of the oil cylinder (3).

2. The portable chain tension force detection device according to claim 1, characterized in that: The clamping device (1) comprises: A left clamping device (101) and a right clamping device (104), wherein the left clamping device (101) and the right clamping device (104) are symmetrically arranged on both sides to clamp the measured chain (4); A bolt and nut connecting piece (103), wherein the bolt and nut connecting piece (103) connects the left clamping device (101) and the right clamping device (104).

3. The portable chain tension force detection device according to claim 2, characterized in that: The left clamping device (101) comprises: Left connector (10101), A left hemispherical surface (10102) is arranged on the inner side of a left connecting seat (10101), a left arc-shaped groove (10103) and a left square groove (10104) are arranged on the inner side of the left hemispherical surface (10102), and the left arc-shaped groove (10103) and the left square groove (10104) form a complete groove surface.

4. The portable chain tension force detection device according to claim 2, characterized in that: The right clamping device (104) comprises: Right connector (10401), A right hemispherical surface (10402), wherein the right hemispherical surface (10402) is arranged on the inner side of the right connecting seat (10401), and a right arc-shaped groove (10403) and a right square groove (10404) are arranged on the inner side of the right hemispherical surface (10402), and the right arc-shaped groove (10403) and the right square groove (10404) form a complete groove surface.

5. The portable chain tension force detection device according to claim 1, characterized in that: The hydraulic system comprises: A hydraulic pump (5), wherein an input end of the hydraulic pump (5) is connected to an oil tank, and an output end of the hydraulic pump (5) is connected to a three-way reversing ball valve (9); The three-way reversing ball valve (9) is connected to the two oil cylinders (3) via an oil pipe (10), and a pressure gauge (8) is installed on the oil pipe (10).

6. The portable chain tension force detection device according to claim 5, characterized in that: An overflow valve (6) is provided between the input end of the hydraulic pump (5) and the oil tank.

7. The portable chain tension force detection device according to claim 5, characterized in that: The oil pipe (10) is provided with a quick-connect connector (7) for connecting two sections of the oil pipe (10).

8. A detection method based on the portable chain tension detection device according to claim 5, characterized in that: include: The reversing ball valve (9) is turned to the non-operating state, at which time the pressure at the oil inlet 302 of the hydraulic cylinder 3 is zero; Manually increase the stroke of the two symmetrically arranged clamping devices (1), and at this time, the complete groove surface formed by the left arc groove (10103) and the right arc groove (10403) of the clamping device (1) contacts the A surface of the cross link I (401); The complete groove surface formed by the arc groove (10103) and the right arc groove (10403) of the symmetrically arranged clamping device (1) contacts the A surface of the transverse chain link II (403), and the rectangular groove formed by the left square groove (10104) and the right square groove (10404) cooperates with the gasket (102) to position the longitudinal chain link (402) so that it does not rotate; The ball valve (9) is switched to the working state, and the hydraulic pump (5) is turned on to supply fluid to the system. The distance between the two clamping devices (1) is gradually reduced under the drive of the oil cylinder (3), and the A surface of the cross link I (401) and the A surface of the cross link II (403) are firmly in contact with the clamping device (1). When the tension F exerted on both ends of the clamping device and the driving force of the oil cylinder are balanced, the system overflows through the overflow valve (6); The system pressure remains unchanged, and the driving force of the oil cylinder (3) is calculated by the pressure gauge (8) and the cylinder diameter and rod diameter of the oil cylinder (3). The driving force of the two oil cylinders is the tension exerted on the measured chain (4).

9. The detection method of the portable chain tension detection device according to claim 8, characterized in that: F=2PS, F is the tension of the measured chain (4), P is the pressure on the pressure gauge, and S is the effective area of ​​the cylinder rod chamber.

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