Hydraulic downhole hammer testing device

Abstract

The application discloses a hydraulic down-the-hole hammer testing device, which comprises a concrete block, a testing unit, a power unit, a propelling unit and a water supply unit, wherein the concrete block is arranged opposite to the testing unit; the testing unit is arranged between a drill bit and an impact piston of the hydraulic down-the-hole hammer and is provided with a strain gauge mounting groove for mounting a strain gauge; when the hydraulic down-the-hole hammer reciprocally impacts and rotates on the concrete block, stress wave signals in the testing process are acquired through the strain gauge, transmitted to a waveform analyzer to collect data and obtain the impact energy of the hydraulic down-the-hole hammer; the propelling unit is used for controlling the testing unit to drive the hydraulic down-the-hole hammer to realize linear propulsion; the power unit is used for driving the hydraulic down-the-hole hammer to rotate through the testing unit; and the water supply unit is used for providing high-pressure water for the hydraulic down-the-hole hammer in the testing process. The application solves the problem that the hydraulic down-the-hole hammer lacks a strain gauge testing position and ensures the accuracy and reliability of the testing result.

Description

Technical Field

[0001] This application relates to the field of hydraulic down-the-hole hammer testing technology, and in particular to a hydraulic down-the-hole hammer testing device. Background Technology

[0002] Hydraulic down-the-hole hammers are commonly used rock-breaking equipment in drilling engineering. They generate continuous impact loads through the high-pressure energy of water-driven media, thereby achieving rock-breaking drilling. The stability of the reciprocating impact and rotational motion of the hydraulic down-the-hole hammer, as well as its impact energy, are key performance parameters affecting its rock-breaking performance. However, the harsh environment at construction sites necessitates performance testing and debugging of the hydraulic down-the-hole hammer before it leaves the factory to analyze its impact performance. Due to the lack of strain gauge testing locations for hydraulic down-the-hole hammers, existing testing methods often require structural modifications, which are costly, time-consuming, and can even affect the accuracy of the final test results due to structural changes. Summary of the Invention

[0003] This application provides a hydraulic down-the-hole hammer testing device to solve the technical problems of high testing costs, long cycles, and poor testing accuracy caused by the lack of strain gauge testing locations when existing hydraulic down-the-hole hammers need to be tested and debugged before leaving the factory.

[0004] The technical solution adopted in this application is as follows:

[0005] A hydraulic down-the-hole hammer testing device includes a concrete block, a testing unit, a power unit, a propulsion unit, and a water supply unit, wherein:

[0006] The concrete block is positioned opposite to the test unit;

[0007] The test unit is set between the drill bit and the impact piston of the hydraulic down-the-hole hammer to be tested. It is equipped with a strain gauge mounting groove, in which a strain gauge is installed. When the hydraulic down-the-hole hammer performs reciprocating impact and rotation on the concrete block, the stress wave signal during the test is obtained through the strain gauge and transmitted to the waveform analyzer to collect data and obtain the impact energy of the hydraulic down-the-hole hammer.

[0008] The propulsion unit is used to provide linear propulsion power and control the test unit to drive the hydraulic downhole hammer to achieve linear propulsion.

[0009] The power unit is mounted on the propulsion unit, and the output end of the power unit is connected to the test unit, which is used to drive the hydraulic downhole hammer to rotate through the test unit.

[0010] The water supply unit is used to provide high-pressure water to the hydraulic down-the-hole hammer during the test.

[0011] Furthermore, the power unit includes a rotary power device, a reducer, and a chuck. The rotary power device and the reducer are both mounted on the propulsion unit. The output end of the rotary power device is connected to the input end of the reducer, and the output end of the reducer is connected to the input end of the chuck. The chuck is also provided with a high-pressure water inlet.

[0012] Furthermore, the rotary power unit adopts a rotary motor, and the oil supply circuit of the rotary motor is connected to the hydraulic pump station through a hydraulic control valve station.

[0013] Furthermore, the rotary power device is an electric motor.

[0014] Furthermore, the propulsion unit includes a sliding beam, a test frame, and a propulsion power device. The sliding beam and the propulsion power device are mounted on the test frame. The output end of the propulsion power device is driven to the sliding beam to drive the sliding components on the sliding beam to perform linear propulsion motion along the sliding beam.

[0015] Furthermore, the propulsion power device adopts a propulsion motor, and the output end of the propulsion motor drives the sliding component on the slide beam to make linear propulsion motion along the slide beam through a chain structure. The oil supply circuit of the propulsion motor is connected to the hydraulic pump station through a hydraulic control valve station.

[0016] Furthermore, the propulsion power device adopts a hydraulic cylinder, the output end of which is connected to the sliding component on the slide beam, and is used to drive the sliding component on the slide beam to make a linear propulsive movement along the slide beam. The oil supply circuit of the hydraulic cylinder is connected to the hydraulic pump station through a hydraulic control valve station.

[0017] Furthermore, the testing unit includes a testing fixture, a pipe clamp, and a drill pipe, wherein:

[0018] The test fixture is integrated into the hydraulic down-the-hole hammer and is located between the drill bit at the front end and the impact piston at the rear end of the hydraulic down-the-hole hammer. Strain gauge mounting grooves are symmetrically arranged on both sides of the outer cylindrical surface of the test fixture for mounting strain gauges.

[0019] The drill rod has an internal flow channel that runs through it along the axial direction and is connected to the high-pressure water inlet of the chuck. The front end of the drill rod is connected to the rear end of the hydraulic down-the-hole hammer by a thread, and the rear end of the drill rod is connected to the output end of the chuck. The rotation of the hydraulic down-the-hole hammer is controlled by power transmission.

[0020] The pipe clamp holds the hydraulic down-the-hole hammer or drill rod. The oil supply circuit of the pipe clamp is connected to the hydraulic pump station through the hydraulic control valve station. During the drilling process of the hydraulic down-the-hole hammer, it provides clamping force for the hydraulic down-the-hole hammer or drill rod. The hydraulic down-the-hole hammer or drill rod performs propulsion or rotation in the pipe clamp.

[0021] Further, the test fixture includes a first ferrule, a transition rod, a first holding sleeve, a first sealing ring, and a first guide sleeve. The transition rod has an internal cavity at its front end and a stepped connecting portion at its rear end. Strain gauge mounting grooves for mounting strain gauges are symmetrically arranged on the outer peripheral wall of the middle portion of the transition rod. A hollow flow channel is axially penetrating inside the transition rod, which connects with the impact piston of the hydraulic down-the-hole hammer and the hollow flow channel inside the drill bit to form a high-pressure water return and pressure relief channel. The return water flows out through a channel at the end of the drill bit. The shape and structure of the front end of the transition rod are consistent with the internal cavity structure of the front end of the hydraulic down-the-hole hammer housing, and the shape and structure of the stepped connecting portion at the rear end of the transition rod are consistent with the stepped connecting portion at the rear end of the hydraulic down-the-hole hammer drill bit. The first ferrule, first holding sleeve, first sealing ring, and first guide sleeve have the same structural shape as the second ferrule, second holding sleeve, second sealing ring, and second guide sleeve that come with the hydraulic down-the-hole hammer. The first ferrule, first holding sleeve, and first guide sleeve are sequentially positioned and pressed into the internal cavity at the front end of the transition rod from the outside to the inside. The first sealing ring is fitted into the annular groove on the outer peripheral wall of the first holding sleeve and seals against the inner wall of the internal cavity at the front end of the transition rod. The stepped connecting part at the rear end of the drill bit is positioned and installed in the mounting cavity formed by the first ferrule, first holding sleeve, and first guide sleeve. The outer peripheral wall of the first ferrule and the internal cavity at the front end of the transition rod are connected by threads. The inner peripheral wall of the first ferrule and the outer peripheral wall of the stepped connecting part at the rear end of the drill bit are connected by splines to transmit torque.

[0022] The second ferrule, the second gripping sleeve, and the second guide sleeve are sequentially positioned and pressed into the internal cavity at the front end of the hydraulic downhole hammer housing from the outside to the inside. The second sealing ring is fitted into the annular groove on the outer peripheral wall of the second gripping sleeve and seals against the inner wall of the hydraulic downhole hammer housing. The stepped connecting part at the rear end of the transition rod is positioned and installed in the mounting cavity formed by the second ferrule, the second gripping sleeve, and the second guide sleeve. The outer peripheral wall of the second ferrule and the internal cavity at the front end of the hydraulic downhole hammer housing are connected by threads. The inner peripheral wall of the second ferrule and the outer peripheral wall of the stepped connecting part at the rear end of the transition rod are connected by splines to transmit torque.

[0023] Furthermore, the water supply unit includes a high-pressure water pump and a water tank. The high-pressure water pump includes a hydraulic motor and a water pump connected together. The oil supply circuit of the hydraulic motor is connected to a hydraulic pump station. The input end of the water pump is connected to the water tank, and the output end is connected to the high-pressure water inlet of the chuck.

[0024] Furthermore, it also includes:

[0025] The wastewater collection tank is located below the hydraulic downhole hammer during testing and is used to collect the wastewater generated during the testing process.

[0026] Compared with the prior art, this application has the following advantages:

[0027] This invention provides a hydraulic down-the-hole hammer testing device, comprising a concrete block, a testing unit, a power unit, a propulsion unit, and a water supply unit, wherein: the concrete block is arranged opposite to the testing unit; the testing unit is connected to the hydraulic down-the-hole hammer to be tested, and is used to acquire stress wave signals during the testing process by setting strain gauges when the hydraulic down-the-hole hammer reciprocates and rotates on the concrete block, and transmits the data to a waveform analyzer to obtain the impact energy of the hydraulic down-the-hole hammer; the propulsion unit is used to provide linear propulsion power, controlling the testing unit to drive the hydraulic down-the-hole hammer to achieve linear propulsion; the power unit is disposed on the propulsion unit, and the output end of the power unit is connected to the testing unit, used to drive the hydraulic down-the-hole hammer to perform rotational motion through the testing unit; the water supply unit is connected to the hydraulic down-the-hole hammer installed in the testing unit, and is used to provide high-pressure water to the hydraulic down-the-hole hammer during the testing process. Therefore, this application has the following advantages:

[0028] 1) The hydraulic down-the-hole hammer testing device proposed in this application consists of a power unit and a propulsion unit that control the propulsion and rotation of the hydraulic down-the-hole hammer. Water is supplied by a water supply unit. The hammer impacts a concrete block, and the testing unit acquires the stress wave signal during the testing process and transmits it to a waveform analyzer for processing. This allows for the debugging of the propulsion and rotation of the hydraulic down-the-hole hammer before it leaves the factory, thereby completing the testing of key parameters such as the impact energy of the hydraulic down-the-hole hammer.

[0029] 2) The test unit described in this application is set between the drill bit and the impact piston of the hydraulic down-the-hole hammer to be tested. It makes good use of the existing structure of the hydraulic down-the-hole hammer itself. It can realize the transfer of impact energy without modifying the structure of the hydraulic down-the-hole hammer to be tested. The test cost is low and the cycle is short.

[0030] 3) The test unit of this application is not only easy to install and use without changing the structure of the hydraulic down-the-hole hammer, but also provides suitable space for installing strain gauges to test the impact energy by setting strain gauge mounting grooves. The strain gauges acquire stress wave signals during the test process and transmit them to the waveform analyzer to collect data and obtain the impact energy of the hydraulic down-the-hole hammer. This solves the problem of the lack of strain gauge test positions in the hydraulic down-the-hole hammer and ensures the accuracy and reliability of the test results.

[0031] 4) The length of the test unit in this application can be flexibly selected and adjusted according to the test requirements and site space. It can be used not only for testing hydraulic down-the-hole hammers, but also for testing other impactors that lack space for strain gauge arrangement. It has strong applicability, wide application range, and broad market application prospects. Attached Figure Description

[0032] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0033] Figure 1 This is a schematic diagram of the overall structure of the hydraulic down-the-hole hammer testing device according to a preferred embodiment of this application.

[0034] Figure 2 This is an enlarged schematic diagram of the test unit according to a preferred embodiment of this application.

[0035] Figure 3 This is an enlarged schematic diagram of the power unit according to a preferred embodiment of this application.

[0036] Figure 4 This is an enlarged schematic diagram of the propulsion unit according to a preferred embodiment of this application.

[0037] Figure 5 This is an enlarged schematic diagram of the test fixture according to a preferred embodiment of this application.

[0038] In the diagram: 101, concrete block; 110, hydraulic control valve station; 111, hydraulic pump station; 112, water tank; 113, high-pressure water pump; 114, propulsion motor; 115, test frame; 116, wastewater collection tank; 102, test fixture; 103, hydraulic down-the-hole hammer; 104, pipe clamp; 105, drill rod; 106, slide beam; 107, chuck; 108, reducer; 109, rotary motor; 201, drill bit; 202, first ferrule; 203, transition rod; 204, first holding sleeve; 205, first sealing ring; 206, first guide sleeve; 207, housing; 208, impact piston; 209, strain gauge mounting groove; 210, second ferrule; 211, second holding sleeve; 212, second sealing ring; 213, second guide sleeve. Detailed Implementation

[0039] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] Reference Figure 1 A preferred embodiment of this application provides a hydraulic down-the-hole hammer testing device, characterized in that it includes a concrete block 101, a testing unit, a power unit, a propulsion unit, and a water supply unit, wherein:

[0041] The concrete block 101 is positioned opposite to the test unit;

[0042] The test unit is set between the drill bit 201 and the impact piston 208 of the hydraulic down-the-hole hammer 103 to be tested, and is provided with a strain gauge mounting groove 209. A strain gauge is installed in the strain gauge mounting groove 209. When the hydraulic down-the-hole hammer 103 performs reciprocating impact and rotation on the concrete block 101, the stress wave signal during the test process is obtained through the strain gauge and transmitted to the waveform analyzer to collect data and obtain the impact energy of the hydraulic down-the-hole hammer 103.

[0043] The propulsion unit is used to provide linear propulsion power and control the test unit to drive the hydraulic downhole hammer 103 to achieve linear propulsion;

[0044] The power unit is mounted on the propulsion unit, and the output end of the power unit is connected to the test unit, which is used to drive the hydraulic downhole hammer 103 to rotate through the test unit.

[0045] The water supply unit is used to provide high-pressure water to the hydraulic down-the-hole hammer 103 during the test.

[0046] This embodiment provides a hydraulic down-the-hole hammer testing device, including a concrete block 101, a testing unit, a power unit, a propulsion unit, and a water supply unit. The concrete block 101 is positioned opposite to the testing unit. The testing unit is connected to the hydraulic down-the-hole hammer 103 to be tested. When the hydraulic down-the-hole hammer 103 reciprocates and rotates against the concrete block 101, strain gauges are used to acquire stress wave signals during the testing process, which are then transmitted to a waveform analyzer to collect data and obtain the impact energy of the hydraulic down-the-hole hammer 103. The propulsion unit provides linear propulsion power, controlling the testing unit to drive the hydraulic down-the-hole hammer 103 in a linear motion. The power unit is mounted on the propulsion unit, and its output is connected to the testing unit, driving the hydraulic down-the-hole hammer 103 to rotate. The water supply unit provides high-pressure water to the hydraulic down-the-hole hammer 103 during the testing process. Therefore, this embodiment has the following advantages:

[0047] 1) The hydraulic down-the-hole hammer testing device proposed in this embodiment is controlled by a power unit and a propulsion unit to control the propulsion and rotation of the hydraulic down-the-hole hammer. Water is supplied by a water supply unit. By impacting the concrete block 101, the stress wave signal during the test is obtained by the testing unit and transmitted to the waveform analyzer for processing. This allows for the debugging of the propulsion and rotation of the hydraulic down-the-hole hammer 103 before it leaves the factory, thereby completing the testing of key parameters such as the impact energy of the hydraulic down-the-hole hammer 103.

[0048] 2) The test unit described in this embodiment is set between the drill bit 201 and the impact piston 208 of the hydraulic down-the-hole hammer 103 to be tested. It cleverly utilizes the existing structure of the hydraulic down-the-hole hammer itself, and can realize the transfer of impact energy without modifying the structure of the hydraulic down-the-hole hammer to be tested. The test cost is low and the cycle is short.

[0049] 3) The test unit of this embodiment is easy to install and use without changing the structure of the hydraulic down-the-hole hammer 103. Moreover, by setting the strain gauge mounting groove 209, it provides a suitable space for installing the strain gauge to test the impact energy. The strain gauge acquires the stress wave signal during the test and transmits it to the waveform analyzer to collect data and obtain the impact energy of the hydraulic down-the-hole hammer 103. This solves the problem of the lack of strain gauge test positions in the hydraulic down-the-hole hammer 103 and ensures the accuracy and reliability of the test results.

[0050] 4) The length of the test unit in this embodiment can be flexibly selected and adjusted according to test requirements and site space. It can be used not only for testing hydraulic down-the-hole hammers, but also for testing other impactors that lack space for strain gauge arrangement. It has strong applicability, wide application range, and broad market application prospects.

[0051] In a preferred embodiment of this application, the power unit includes a rotary power device, a reducer 108, and a chuck 107. The rotary power device and the reducer 108 are both mounted on the propulsion unit. The output end of the rotary power device is connected to the input end of the reducer 108, and the output end of the reducer 108 is connected to the input end of the chuck 107. The chuck 107 is also provided with a high-pressure water inlet.

[0052] In a preferred embodiment of this application, the hydraulic down-the-hole hammer testing device further includes a wastewater collection tank 116, which is located below the hydraulic down-the-hole hammer 103 and is used to collect wastewater generated during the testing process, so as to avoid the wastewater generated during the testing process from polluting the environment. At the same time, the collected wastewater can be recycled after appropriate treatment, thereby further reducing the testing cost.

[0053] like Figure 2 As shown, in a preferred embodiment of this application, the testing unit includes a testing fixture 102, a hydraulic down-the-hole hammer 103, a pipe clamp 104, and a drill rod 105, wherein:

[0054] The test fixture 102 is integrated into the hydraulic down-the-hole hammer 103 and is located between the drill bit 201 at the front end and the impact piston 208 at the rear end of the hydraulic down-the-hole hammer 103. Strain gauge mounting grooves 209 are symmetrically arranged on both sides of the outer cylindrical surface of the test fixture 102 for mounting strain gauges.

[0055] The drill rod 105 has an internal flow channel that runs through it along the axial direction and is connected to the high-pressure water inlet of the chuck 107. The front end of the drill rod 105 is connected to the rear end of the hydraulic down-the-hole hammer 103 by a thread, and the rear end of the drill rod 105 is connected to the output end of the chuck 107. Through power transmission, the rotation of the hydraulic down-the-hole hammer 103 is controlled for drilling.

[0056] The clamp 104 holds the hydraulic down-the-hole hammer 103 or the drill rod 105. The oil supply circuit of the clamp 104 is connected to the hydraulic pump station 111 through the hydraulic control valve station 110. During the drilling process of the hydraulic down-the-hole hammer 103, the clamp provides clamping force to the hydraulic down-the-hole hammer 103 or the drill rod 105. The hydraulic down-the-hole hammer 103 or the drill rod 105 performs pushing or rotating actions in the clamp 104, ensuring that the hydraulic down-the-hole hammer 103 and the drill rod 105 remain stable during the pushing or rotating process, and avoiding excessive swing amplitude that would affect the reliability and stability of the test.

[0057] like Figure 3 As shown, in a preferred embodiment of this application, the rotary power device is a rotary motor 109. The oil supply circuit of the rotary motor 109 is connected to the hydraulic pump station 111 through the hydraulic control valve station 110. The rotation direction and speed of the rotary motor 109 are controlled by the hydraulic control valve station 110 to meet the testing requirements.

[0058] In a preferred embodiment of this application, the rotary power device is an electric motor, such as a variable frequency motor or a stepper motor, and the speed and direction of the motor are controlled to meet the testing requirements.

[0059] like Figure 4 As shown, in a preferred embodiment of this application, the propulsion unit includes a slide beam 106, a test frame 115, and a propulsion power device. The slide beam 106 and the propulsion power device are mounted on the test frame 115. The output end of the propulsion power device is driven to the slide beam 106 and is used to drive the sliding components on the slide beam 106 to perform linear propulsion motion along the slide beam 106.

[0060] In a preferred embodiment of this application, the propulsion power device is a propulsion motor 114. The output end of the propulsion motor 114 drives the sliding component on the slide beam 106 to perform linear propulsion motion along the slide beam 106 via a chain structure. The oil supply circuit of the propulsion motor 114 is connected to the hydraulic pump station 111 via a hydraulic control valve station 110. The hydraulic control valve station 110 controls the direction and speed of the propulsion motor 114 to drive the sliding component on the slide beam 106 to perform linear propulsion motion along the slide beam 106 in a set direction and speed to meet the testing requirements.

[0061] In a preferred embodiment of this application, the propulsion power device is a hydraulic cylinder. The output end of the hydraulic cylinder is connected to the sliding component on the slide beam 106, which drives the sliding component on the slide beam 106 to perform linear propulsion motion along the slide beam 106. The oil supply circuit of the hydraulic cylinder is connected to the hydraulic pump station 111 through the hydraulic control valve station 110. The hydraulic control valve station 110 controls the extension and retraction direction and speed of the hydraulic cylinder to drive the sliding component on the slide beam 106 to perform linear propulsion motion along the slide beam 106 in a set direction and speed to meet the testing requirements.

[0062] Alternatively, the propulsion power device can also be a linear motor, the output end of which is connected to the sliding component on the slide beam 106, to drive the sliding component on the slide beam 106 to perform linear propulsion motion along the slide beam 106, in order to meet the testing requirements.

[0063] like Figure 5As shown, in a preferred embodiment of this application, the test fixture 102 includes a first ferrule 202, a transition rod 203, a first gripping sleeve 204, a first sealing ring 205, and a first guide sleeve 206. The transition rod 203 has an internal cavity at its front end and a stepped connection at its rear end. Strain gauge mounting grooves 209 are symmetrically arranged on the outer peripheral wall of the middle portion of the transition rod 203. A hollow flow channel is axially penetrating inside the transition rod 203. This hollow flow channel connects with the impact piston 208 of the hydraulic down-the-hole hammer 103 and the hollow flow channel inside the drill bit 201 to form a high-pressure water return and pressure relief channel. The return water flows out through the orifice at the end of the drill bit 201. The shape and structure of the front end of the transition rod 203 are consistent with the internal cavity structure of the front end of the housing 207 of the hydraulic down-the-hole hammer 103. The shape and structure of the stepped connection part at the rear end of the transition rod 203 are consistent with the shape and structure of the stepped connection part at the rear end of the drill bit 201 of the hydraulic down-the-hole hammer 103. The first ferrule 202, the first holding sleeve 204, the first sealing ring 205, and the first guide sleeve 206 are consistent with the structure and shape of the second ferrule 210, the second holding sleeve 211, the second sealing ring 212, and the second guide sleeve 213 provided with the hydraulic down-the-hole hammer 103. The first ferrule 202, the first holding sleeve 204, and the first guide sleeve 206 are sequentially limited and pressed from the outside to the inside in front of the transition rod 203. In the internal cavity of the end, the first sealing ring 205 is fitted in the annular groove of the outer peripheral wall of the first holding sleeve 204 and seals against the inner wall of the internal cavity of the front end of the transition rod 203. The stepped connecting part of the rear end of the drill bit 201 is limited and installed in the mounting cavity formed by the first ferrule 202, the first holding sleeve 204, and the first guide sleeve 206. The outer peripheral wall of the first ferrule 202 and the internal cavity of the front end of the transition rod 203 are connected by threads. The inner peripheral wall of the first ferrule 202 and the outer peripheral wall of the stepped connecting part of the rear end of the drill bit 201 are connected by splines to transmit torque. The second ferrule 210, the second holding sleeve 211, and the second guide sleeve 213 are limited sequentially from the outside to the inside. The second sealing ring 212 is fitted in the annular groove of the outer peripheral wall of the second holding sleeve 211 and seals against the inner wall of the housing 207 of the hydraulic downhole hammer 103. The stepped connecting part at the rear end of the transition rod 203 is limited and installed in the mounting cavity formed by the second ferrule 210, the second holding sleeve 211, and the second guide sleeve 213. The outer peripheral wall of the second ferrule 210 and the inner cavity at the front end of the housing 207 of the hydraulic downhole hammer 103 are connected by threads. The inner peripheral wall of the second ferrule 210 and the outer peripheral wall of the stepped connecting part at the rear end of the transition rod 203 are connected by splines to transmit torque.

[0064] When the drill bit 201 and transition rod 203 are movably advanced for impact, they are simultaneously limited and controlled by the first holding sleeve 204 to prevent them from disengaging. For ease of assembly, the first holding sleeve 204 includes two 180° semicircular sleeves, which are combined to form the first holding sleeve 204 and bound by the first sealing ring 205. The structure of the second holding sleeve 211 and the second sealing ring 212 is similar to that of the first holding sleeve 204 and the first sealing ring 205, and will not be described in detail here. The transition rod 203 has a hollow flow channel inside, which, together with the impact piston 208 of the hydraulic down-the-hole hammer 103 and the hollow flow channel inside the drill bit 201, forms a high-pressure water return and pressure relief channel. The return water flows out through multiple channels at the end of the drill bit 201 and finally flows into the wastewater collection tank 116 of the hydraulic down-the-hole hammer testing device.

[0065] This embodiment provides a detailed structure of the test fixture 102. It can be seen that the test fixture 102 in this embodiment includes a first retaining sleeve 202, a transition rod 203, a first holding sleeve 204, a first sealing ring 205, and a first guide sleeve 206. The first retaining sleeve 202, transition rod 203, first holding sleeve 204, first sealing ring 205, and first guide sleeve 206 are respectively consistent with the structural shapes of the second retaining sleeve 210, second holding sleeve 211, second sealing ring 212, and second guide sleeve 213 that are inherent to the hydraulic down-the-hole hammer 103. Simultaneously, the transition... The internal cavity at the front end and the stepped connection at the rear end of the rod 203 are respectively matched in shape and structure with the internal cavity at the front end of the housing 207 of the hydraulic down-the-hole hammer 103 and the stepped connection at the rear end of the drill bit 201. Furthermore, strain gauge mounting grooves 209 are symmetrically arranged on the outer peripheral wall of the middle part of the transition rod 203. Thus, during testing, no modifications to the structure of the hydraulic down-the-hole hammer 103 are required; simply separate the drill bit 201 of the hydraulic down-the-hole hammer 103 to be tested from the housing 207, and then connect the stepped connection at the rear end of the drill bit 201. The ladder connection part is limited and installed in the mounting cavity formed by the first clamping sleeve 202, the first holding sleeve 204, and the first guide sleeve 206. Simultaneously, the stepped connection part at the rear end of the transition rod 203 is limited and installed in the mounting cavity formed by the first clamping sleeve 202, the first holding sleeve 204, and the first guide sleeve 206 within the internal cavity at the front end of the housing 207 of the hydraulic down-the-hole hammer 103. This allows testing to begin with the coordinated operation of the power unit, propulsion unit, and water supply unit, without requiring any modifications to the structure of the hydraulic down-the-hole hammer 103 under test. During testing... The rear end of the transition rod 203 bears the impact of the piston of the hydraulic down-the-hole hammer 103. When the impact piston 208 impacts, the test fixture 102 as a whole bears the impact force and transmits the force to the drill bit 201, thereby transmitting the impact energy to the concrete block 101 in the form of stress waves. At this time, the strain gauges that are symmetrically arranged in the two strain gauge mounting grooves 209 on the outer peripheral wall of the middle part of the transition rod 203 and are attached in series form a measurement bridge to obtain the stress wave signal during the test process, and transmit it to the waveform analyzer to collect data and obtain the impact energy of the hydraulic down-the-hole hammer 103.

[0066] Therefore, the test unit of this embodiment is not only easy to install and use without changing the structure of the hydraulic down-the-hole hammer, but also provides suitable space for installing strain gauges to test the impact energy by setting strain gauge mounting grooves 209. The strain gauges acquire stress wave signals during the test process and transmit them to the waveform analyzer to collect data and obtain the impact energy of the hydraulic down-the-hole hammer. This solves the problem of the lack of strain gauge testing positions in the hydraulic down-the-hole hammer 103 and ensures the accuracy and reliability of the test results.

[0067] In a preferred embodiment of this application, the water supply unit includes a high-pressure water pump 113 and a water tank 112. The high-pressure water pump 113 includes a hydraulic motor and a water pump connected together. The oil supply circuit of the hydraulic motor is connected to the hydraulic pump station 111. The input end of the water pump is connected to the water tank 112, and the output end is connected to the high-pressure water inlet of the chuck 107.

[0068] In this embodiment, the hydraulic pump station 111 is connected to the high-pressure water pump 113 via a control oil circuit. The high-pressure water pump 113 is supplied with water from the water tank 112. After being pressurized by the water pump, the power is transmitted to the high-pressure water inlet of the chuck 107, and then transmitted through the internal flow channel of the drill rod 105 to the internal control flow channel of the hydraulic down-the-hole hammer 103, thereby realizing the high-frequency reciprocating impact of the hydraulic down-the-hole hammer 103.

[0069] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A hydraulic down-the-hole hammer testing device, characterized in that, Includes concrete block (101), testing unit, power unit, propulsion unit, and water supply unit, wherein: The concrete block (101) is positioned opposite to the test unit; The test unit is set between the drill bit (201) and the impact piston (208) of the hydraulic down-the-hole hammer (103) to be tested, and is provided with a strain gauge mounting groove (209). A strain gauge is installed in the strain gauge mounting groove (209). When the hydraulic down-the-hole hammer (103) performs reciprocating impact and rotation on the concrete block (101), the stress wave signal during the test process is obtained through the strain gauge and transmitted to the waveform analyzer to collect data and obtain the impact energy of the hydraulic down-the-hole hammer (103). The test unit includes a test fixture (102), which includes a transition rod (203). The front end of the transition rod (203) is provided with an internal cavity, and the rear end is provided with a stepped connection part. The shape and structure of the internal cavity at the front end of the transition rod (203) are consistent with the shape and structure of the internal cavity at the front end of the housing (207) of the hydraulic down-the-hole hammer (103). The shape and structure of the stepped connection part at the rear end of the transition rod (203) are consistent with the shape and structure of the stepped connection part at the rear end of the drill bit (201) of the hydraulic down-the-hole hammer (103). The propulsion unit is used to provide linear propulsion power and control the test unit to drive the hydraulic downhole hammer (103) to achieve linear propulsion; The power unit is mounted on the propulsion unit, and the output end of the power unit is connected to the test unit, which is used to drive the hydraulic downhole hammer (103) to rotate through the test unit. The water supply unit is used to provide high-pressure water to the hydraulic down-the-hole hammer (103) during the test.

2. The hydraulic down-the-hole hammer testing device according to claim 1, characterized in that, The power unit includes a rotary power device, a reducer (108), and a chuck (107). The rotary power device and the reducer (108) are both mounted on the propulsion unit. The output end of the rotary power device is connected to the input end of the reducer (108), and the output end of the reducer (108) is connected to the input end of the chuck (107). The chuck (107) is also provided with a high-pressure water inlet.

3. The hydraulic down-the-hole hammer testing device according to claim 2, characterized in that, The rotary power unit adopts a rotary motor (109), and the oil supply circuit of the rotary motor (109) is connected to the hydraulic pump station (111) through the hydraulic control valve station (110).

4. The hydraulic down-the-hole hammer testing device according to claim 2, characterized in that, The rotary power unit is an electric motor.

5. The hydraulic down-the-hole hammer testing device according to claim 1, characterized in that, The propulsion unit includes a slide beam (106), a test frame (115), and a propulsion power device. The slide beam (106) and the propulsion power device are mounted on the test frame (115). The output end of the propulsion power device is driven to the slide beam (106) to drive the sliding components on the slide beam (106) to perform linear propulsion motion along the slide beam (106).

6. The hydraulic down-the-hole hammer testing device according to claim 5, characterized in that, The propulsion power device adopts a propulsion motor (114). The output end of the propulsion motor (114) drives the sliding component on the slide beam (106) to make a linear propulsion motion along the slide beam (106) through a chain structure. The oil supply circuit of the propulsion motor (114) is connected to the hydraulic pump station (111) through the hydraulic control valve station (110).

7. The hydraulic down-the-hole hammer testing device according to claim 5, characterized in that, The propulsion power device adopts a hydraulic cylinder. The output end of the hydraulic cylinder is connected to the sliding component on the slide beam (106) to drive the sliding component on the slide beam (106) to make a linear propulsion motion along the slide beam (106). The oil supply circuit of the hydraulic cylinder is connected to the hydraulic pump station (111) through the hydraulic control valve station (110).

8. The hydraulic down-the-hole hammer testing device according to claim 2, characterized in that, The test unit includes a test fixture (102), a pipe clamp (104), and a drill pipe (105), wherein: The test fixture (102) is integrated into the hydraulic down-the-hole hammer (103) and is located between the drill bit (201) at the front end of the hydraulic down-the-hole hammer (103) and the impact piston (208) at the rear end. The test fixture (102) has symmetrically arranged strain gauge mounting grooves (209) on both sides of the outer cylindrical surface for mounting strain gauges. The drill rod (105) has an internal flow channel that is axially connected to the high-pressure water inlet of the chuck (107). The front end of the drill rod (105) is connected to the rear end of the hydraulic down-the-hole hammer (103) by a thread. The rear end of the drill rod (105) is connected to the output end of the chuck (107). Through power transmission, the rotation of the hydraulic down-the-hole hammer (103) is controlled. The clamp (104) holds the hydraulic down-the-hole hammer (103) or drill rod (105). The oil supply circuit of the clamp (104) is connected to the hydraulic pump station (111) through the hydraulic control valve station (110). During the drilling process of the hydraulic down-the-hole hammer (103), the clamp provides clamping force for the hydraulic down-the-hole hammer (103) or drill rod (105). The hydraulic down-the-hole hammer (103) or drill rod (105) performs pushing or rotating actions in the clamp (104).

9. The hydraulic down-the-hole hammer testing device according to claim 8, characterized in that, The test fixture (102) includes a first ferrule (202), a transition rod (203), a first holding sleeve (204), a first sealing ring (205), and a first guide sleeve (206). The transition rod (203) has an internal cavity at its front end and a stepped connection at its rear end. Strain gauge mounting grooves (209) are symmetrically arranged on the outer peripheral wall of the middle portion of the transition rod (203). A hollow flow channel is axially penetrating inside the transition rod (203), and this hollow flow channel impacts the hydraulic downhole hammer (103). The hollow flow channels inside the piston (208) and drill bit (201) are connected to form a high-pressure water return and pressure relief channel, and the return water flows out through the channel at the end of the drill bit (201); the shape and structure of the front end of the transition rod (203) are consistent with the internal cavity structure of the front end of the housing (207) of the hydraulic down-the-hole hammer (103), and the shape and structure of the stepped connection part at the rear end of the transition rod (203) are consistent with the shape and structure of the stepped connection part at the rear end of the drill bit (201) of the hydraulic down-the-hole hammer (103); the first ferrule (202), the first grip The sleeve (204), the first sealing ring (205), and the first guide sleeve (206) have the same structural shape as the second retaining sleeve (210), the second holding sleeve (211), the second sealing ring (212), and the second guide sleeve (213) that come with the hydraulic downhole hammer (103). The first retaining sleeve (202), the first holding sleeve (204), and the first guide sleeve (206) are sequentially positioned and pressed into the internal cavity at the front end of the transition rod (203) from the outside to the inside. The first sealing ring (205) is fitted around the outer periphery of the first holding sleeve (204). The inner wall of the annular groove of the wall is sealed to the inner wall of the internal cavity of the front end of the transition rod (203). The stepped connection part of the rear end of the drill bit (201) is limited and installed in the mounting cavity formed by the first ferrule (202), the first holding sleeve (204), and the first guide sleeve (206). The outer peripheral wall of the first ferrule (202) and the internal cavity of the front end of the transition rod (203) are connected by threads. The inner peripheral wall of the first ferrule (202) and the outer peripheral wall of the stepped connection part of the rear end of the drill bit (201) are connected by splines to transmit torque. The second ferrule (210), the second grip sleeve (211), and the second guide sleeve (213) are sequentially positioned and pressed into the internal cavity at the front end of the housing (207) of the hydraulic downhole hammer (103) from the outside to the inside. The second sealing ring (212) is fitted into the annular groove on the outer peripheral wall of the second grip sleeve (211) and seals against the inner wall of the housing (207) of the hydraulic downhole hammer (103). The stepped connecting part at the rear end of the transition rod (203) is positioned and installed in the mounting cavity formed by the second ferrule (210), the second grip sleeve (211), and the second guide sleeve (213). The outer peripheral wall of the second ferrule (210) and the internal cavity at the front end of the housing (207) of the hydraulic downhole hammer (103) are connected by threads. The inner peripheral wall of the second ferrule (210) and the outer peripheral wall of the stepped connecting part at the rear end of the transition rod (203) are connected by splines to transmit torque.

10. The hydraulic down-the-hole hammer testing device according to claim 2, characterized in that, The water supply unit includes a high-pressure water pump (113) and a water tank (112). The high-pressure water pump (113) includes a hydraulic motor and a water pump connected together. The oil supply circuit of the hydraulic motor is connected to the hydraulic pump station (111). The input end of the water pump is connected to the water tank (112), and the output end is connected to the high-pressure water inlet of the chuck (107).

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