Torque wrench suitable for gauge valve

Abstract

The utility model relates to the technical field of maintenance tools, in particular to a torque wrench suitable for an instrument valve, which comprises a rod body, a transmission rod, a jacking assembly and a self-locking sleeve, one axial side of the rod body is hollow, and an avoiding hole vertically communicated with the hollow cavity is formed in the middle of the rod body; the transmission rod is provided with a first section and a second section, the first section is located in the hollow cavity and rotationally connected with the cavity wall of the hollow cavity through a bolt, a gap is formed between the end, away from the bolt, of the first section and the cavity wall of the hollow cavity, one end of the second section penetrates through the receding hole to be connected with the first section, and a clamping groove is formed in the end face of the other end of the second section; the jacking assembly is arranged on the first section and connected with the end of the first section so as to provide axial pressure for the first section. The second section is sleeved with the self-locking sleeve, a fastening piece is arranged on the self-locking sleeve, and an internal thread is constructed on a port, away from the second section, of the self-locking sleeve. Maintenance personnel can conveniently apply specific torque to the instrument valve.

Description

Technical Field

[0001] The present application relates to the technical field of maintenance tools, and in particular to a torque wrench suitable for instrument valves. Background Art

[0002] The spool of an instrument valve is made of graphite. Using existing instrument wrenches to open and close the valve affects the sealing of the valve spool. Furthermore, operators cannot precisely control the force required to open and close the valve, relying solely on feel. In this reality, many instrument valves suffer from graphite damage, leading to internal leakage. During unit commissioning and testing, if the instrument spool of a related system leaks and cannot be effectively isolated, the test will fail, impacting the commissioning process. During overhaul, when calibrating instruments and assisting with venting the instrument, damage to the instrument spool and the inability to effectively isolate the spool will hinder the progress of the overhaul. During routine operation, if the instrument spool of an important system leaks, this can lead to inaccurate operational monitoring data, easily leading to misjudgments and posing a significant risk to the safe and stable operation of the unit. In other words, the torque provided by existing instrument wrenches is manually sensed during use, making it difficult to meet the specific torque requirements of the instrument valve. Utility Model Content

[0003] The present application provides a torque wrench suitable for instrument valves. A torque prompt structure is set on the wrench. When the wrench is applied to a specific torque, it can feedback information to the maintenance personnel to remind the maintenance personnel to stop applying force, thereby solving the problem that existing instrument wrenches are difficult to meet the specific torque requirements of instrument valves.

[0004] This application is implemented through the following technical solutions:

[0005] A torque wrench suitable for an instrument valve, comprising:

[0006] A rod body, wherein one axial side of the rod body is hollow, and a middle portion of the rod body is provided with an avoidance hole vertically connected to the hollow cavity;

[0007] A transmission rod having a first section and a second section, wherein the first section is located in the hollow cavity and is rotatably connected to the cavity wall of the hollow cavity via a latch, a gap being defined between an end of the first section away from the latch and the cavity wall of the hollow cavity, one end of the second section passing through the avoidance hole and connected to the first section, and a slot being configured on an end surface of the other end of the second section;

[0008] a supporting assembly, the supporting assembly being arranged on the first section and connected to an end portion of the first section to provide axial pressure to the first section;

[0009] A self-locking sleeve is sleeved on the second segment, and a fastening member is arranged on the self-locking sleeve, and an inner thread is arranged on the end of the self-locking sleeve away from the second segment.

[0010] The torque wrench suitable for the instrument valve provided in the application is applied with a torque to the whole wrench after the second segment on the transmission rod is matched with the instrument valve, when the torque borne by the second segment exceeds a specific value, the axial pressure provided by the top-holding assembly is insufficient to keep the state of the first segment, at this time, the first segment rotates around the pin axis, the end of the first segment away from the pin collides with the cavity wall of the hollow cavity to generate a prompt sound effect, and after the maintenance personnel receive the prompt sound effect information, the torque can be removed, so that the instrument valve is adjusted at a specific torque.

[0011] In some optional embodiments, the fastening member is configured as a fastening screw.

[0012] In some optional embodiments, the number of the fastening members is configured as multiple.

[0013] In some optional embodiments, the fastening screw is uniformly distributed around the length direction of the second segment.

[0014] In some optional embodiments, a limiting ring groove is coaxially arranged on the outer wall of the second segment, and the end of the fastening member is located in the limiting ring groove.

[0015] In some optional embodiments, a through hole is radially arranged on the first segment, and the pin is located in the through hole.

[0016] In some optional embodiments, the top-holding assembly is in contact with the end of the first segment through a pivot block.

[0017] In some optional embodiments, a groove suitable for accommodating the pivot block is arranged on the end surface of the first segment.

[0018] In some optional embodiments, the top-holding assembly comprises:

[0019] A first pad is movably arranged in the hollow cavity of the first segment.

[0020] A force-accumulating spring is connected to one end of the first pad.

[0021] A second pad is movably arranged in the hollow cavity of the first segment, the second pad is connected to the other end of the force-accumulating spring, and the second pad is used to contact the end of the first segment.

[0022] In some alternative embodiments, a scale rod is rotatably arranged on the first pad block, one end of the scale rod penetrates through the rod body, and an adjusting knob is connected to the end of the scale rod, wherein the scale rod is threadedly connected with the rod body.

[0023] Compared with the prior art, the application has the following advantages and beneficial effects:

[0024] The torque wrench suitable for the instrument valve provided by the application, when the second segment is matched with the instrument valve, exerts a torque on the whole wrench, when the torque borne by the second segment exceeds a specific value, the axial pressure provided by the top-holding assembly is insufficient to keep the state of the first segment, at this time, the first segment rotates around the pin axis, the end of the first segment away from the pin collides with the cavity wall of the hollow cavity to produce a prompt sound effect, after the maintenance personnel receive the prompt sound effect information, the torque can be removed, so that the instrument valve is adjusted at a specific torque. BRIEF DESCRIPTION OF DRAWINGS

[0025] The drawings described herein are used to provide further understanding of the embodiments of the application, constitute a part of the application, and do not constitute a limitation on the embodiments of the application. In the drawings:

[0026] Figure 1 The structure schematic diagram of the torque wrench suitable for the instrument valve provided by the embodiments of the application is shown;

[0027] Figure 2 The structure schematic diagram of the torque wrench suitable for the instrument valve provided by the embodiments of the application is shown;

[0028] Figure 3 The structure schematic diagram of the torque wrench suitable for the instrument valve provided by the embodiments of the application is shown;

[0029] Figure 4 The Figure 3 The enlarged structure schematic diagram of the middle A is shown.

[0030] The marks in the drawings and the corresponding names of the parts are as follows:

[0031] 1-rod body, 2-transmission rod, 3-self-locking sleeve, 4-pin, 5-hollow cavity, 6-retaining member, 7-limiting ring groove, 8-first pad block, 9-energy storage spring, 10-second pad block, 11-pivot block, 12-scale rod, 13-adjusting knob, 14-clamping groove. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the application more clear and obvious, the application is further described in detail below in combination with the embodiments and drawings, the illustrative embodiments of the application and the description thereof are used to explain the application, and do not limit the application.

[0033] AsFigures 1-4 As shown, the embodiment of the present application provides a torque wrench suitable for instrument valve, which comprises a rod body 1, a transmission rod 2, a supporting assembly and a self-locking sleeve 3; the axial side of the rod body 1 is hollow, and the middle part of the rod body 1 is provided with an avoiding hole which is vertically communicated with the hollow cavity 5; the transmission rod 2 has a first section and a second section, the first section is located in the hollow cavity 5 and is rotationally connected with the cavity wall of the hollow cavity 5 through a bolt 4, the end of the first section away from the bolt 4 has a gap with the cavity wall of the hollow cavity 5, the second section is connected with the first section through the avoiding hole, and the end face of the second section is configured with a clamping groove 14; the supporting assembly is arranged on the first section and connected with the end of the first section to provide axial pressure to the first section; the self-locking sleeve 3 is sleeved on the second section, the self-locking sleeve 3 is provided with a fastening part 6, and the end of the self-locking sleeve 3 away from the second section is configured with an internal thread.

[0034] The torque wrench suitable for instrument valve provided by the embodiment of the present application, after the second section of the transmission rod 2 is matched with the instrument valve, the torque wrench as a whole is applied with a torque, when the torque borne by the second section exceeds a certain value, the axial pressure provided by the supporting assembly is not enough to keep the state of the first section, at this time, the first section will rotate around the axis of the bolt 4, the end of the first section away from the bolt 4 will collide with the cavity wall of the hollow cavity 5 to produce a prompt sound effect, after the maintenance personnel receive the prompt sound effect information, the torque can be removed, so that the instrument valve is adjusted under a certain torque.

[0035] In the embodiment of the present application, the rod body 1 can be a circular rod body 1 to facilitate the maintenance personnel to hold, so as to facilitate the maintenance personnel to apply the torque, the rod body 1 is divided into two parts from the axial middle part, for example, the left part is a hollow pipe body shape, and the right part is a solid shape, the right part is used for the maintenance personnel to hold, the inner cavity of the left part is used as the hollow cavity 5 to install the supporting assembly, the transmission rod 2 and the bolt 4, wherein, the end of the left part close to the right part is provided with a radial hole.

[0036] In the embodiment of the present application, the transmission rod 2 is a circular rod as a whole, the first section is a variable-diameter circular rod shape, wherein the end with smaller diameter is away from the radial hole, and the end with larger diameter is close to the radial hole, in the axial view of the radial hole, the end with larger diameter is located in the radial hole, and the position of the bolt 4 is close to the radial hole, so that the end with smaller diameter of the first section has a larger swing range to ensure the action sensitivity of the end; the second section can be coaxial with the radial hole, and the second section is vertically arranged with the first section, that is, the transmission rod 2 is an L-shaped rod body 1 as a whole, the clamping groove 14 on the end face of the second section is a four-corner clamping groove 14, when the rotation trend of the second section is large enough, the first section will overcome the friction with the bolt 4 to rotate, that is, the end with smaller diameter of the first section will collide with the cavity wall of the hollow cavity 5 to produce a prompt sound effect.

[0037] In some optional embodiments, in order to ensure that the sound of the prompt tone is clear and distinguishable, the smaller end of the first section is a metal end, and the cavity wall of the hollow cavity 5 is a metal wall.

[0038] In the embodiments of the present application, the axial pressure provided by the top-holding assembly to the first section can be preloaded, that is, after the wrench is assembled, the top-holding assembly forms a fixed axial pressure on the first section; the axial pressure provided by the top-holding assembly to the first section can be variable pressure, for example, the top-holding assembly is internally provided with an elastic member, and the axial pressure is provided to the first section through the deformation of the elastic member, or the top-holding assembly itself is a component made of an elastic material, and the end of the first section contacts the surface of the top-holding assembly to cause the elastic deformation of the surface of the top-holding assembly to provide the axial pressure.

[0039] In some optional embodiments, the top-holding assembly provides axial pressure to the first section by internally arranging an elastic member, which is easy to adjust the axial pressure. For example, the top-holding assembly can specifically include a first pad 8, a force storage spring 9, and a second pad 10; the first pad 8 is movably arranged in the hollow cavity 5 of the first section, wherein the first pad 8 can move along the axial direction of the first section; one end of the force storage spring 9 is connected with the first pad 8, wherein the force storage spring 9 is coaxially arranged with the first section; the second pad 10 is movably arranged in the hollow cavity 5 of the first section, and the other end of the force storage spring 9 is connected with the second pad 10; the second pad 10 is used to contact the end of the first section, so that by adjusting the initial distance between the first pad 8 and the second pad 10, the force storage spring 9 can be in different compression states, so that the second pad 10 can provide different axial pressures to the first section, and thus the wrench can be suitable for maintenance occasions with various torque requirements.

[0040] In order to facilitate the adjustment of the initial distance between the first pad 8 and the second pad 10, in some optional embodiments, a scale rod 12 penetrating through the rod body 1 is rotationally arranged on the first pad 8, and an adjusting knob 13 is connected to the end of the scale rod 12, wherein the scale rod 12 is threadedly connected with the rod body 1; the maintenance personnel act on the adjusting knob 13 to make the scale rod 12 rotate, so that the distance between the first pad 8 and the cavity wall of the hollow cavity 5 changes, thereby changing the distance between the first pad 8 and the second pad 10. The scale on the scale rod 12 can be used as a reference for the maintenance personnel to facilitate adjustment.

[0041] In the embodiments of the present application, the self-locking sleeve 3 is a circular sleeve coaxially sleeved on the second section; in order to facilitate obtaining and operation, in some optional embodiments, the fastening member 6 is configured as a fastening screw.

[0042] In order to ensure that the self-locking sleeve 3 is accurately positioned in the axial direction, in some optional embodiments, the number of fastening members 6 is configured as multiple, and multiple fastening screws can generate multiple fastening effects, which can ensure the axial stability of the self-locking sleeve 3.

[0043] In order to prevent uneven force in the circumferential direction of the self-locking sleeve 3, in some optional embodiments, the set screws are uniformly distributed around the second length direction. Among them, multiple set screws can be located on the same circumference, or can be located on different circumferences, that is, in the radial view of the self-locking sleeve 3, all set screws do not have to be located on the same straight line. Considering the convenience of operation, in actual implementation, multiple screws are located on the same circumference.

[0044] In order to prevent the self-locking sleeve 3 from falling off during the operation of the self-locking sleeve 3, in some optional embodiments, a limiting ring groove 7 is coaxially arranged on the outer wall of the second section, and the end of the set screw 6 is located in the limiting ring groove 7. The limiting ring groove 7 can axially limit the end of the set screw, thereby preventing the self-locking sleeve 3 from being separated from the second section in the axial direction, which will facilitate the improvement of maintenance convenience.

[0045] In order to facilitate the installation of the bolt 4 hole, in some optional embodiments, a through hole is radially arranged on the first section, and the bolt 4 is located in the through hole.

[0046] In order to avoid mutual abrasion between the first section and the top holding assembly, and at the same time improve the action sensitivity of the smaller diameter end of the first section, in some optional embodiments, the top holding assembly is in contact with the end of the first section through a pivot block 11. After the pivot block 11 is arranged, when the smaller diameter end of the first section swings, it only needs to overcome the rolling friction with the pivot block 11. Compared with the static friction generated by the direct contact between the first section and the top holding assembly, the first section is more easily swung, that is, when the torque borne by the second section reaches a certain value, the action sensitivity of the first section is better, which is convenient for the maintenance personnel to apply accurate torque to the instrument valve.

[0047] In order to prevent the pivot block 11 from radially moving between the first section and the top holding assembly, in some optional embodiments, a groove suitable for accommodating the pivot block 11 is arranged on the end face of the first section. In actual implementation, the cross-sectional shape of the pivot block 11 is rectangular after rounding, and the groove is adapted to the cross-sectional shape of the pivot block 11. When the top holding assembly includes a second pad 10, a groove is also arranged on the second pad 10. The two grooves limit the pivot block 11 on both sides in the radial direction, which can prevent the pivot block 11 from moving radially. It should be noted that the first section and the second pad 10 should maintain sufficient spacing to prevent the first section from being stuck with the second pad 10 when the first section moves.

[0048] In use, the self-locking sleeve 3 is matched with the instrument valve through the thread, which can prevent the wrench from falling off when the maintenance personnel removes the wrench, the axial position of the second section is adjusted to match the clamping groove 14 of the second section with the instrument valve, then the self-locking sleeve 3 and the second section are fixed relative to each other through the set screw, the lever body 1 is held and a certain torsion force is applied to drive the second section to drive the valve core of the instrument valve to act, when the torque feedback by the valve core to the second section reaches a certain value, the second section drives the first section to act to make the smaller-diameter end of the first section swing, so that the smaller-diameter end of the first section collides with the cavity wall of the hollow cavity 5 to produce a prompt sound effect, and the maintenance personnel can remove the torsion force after receiving the prompt sound effect. For instrument valves of different specifications, they have different torque requirements, at this time, it is only necessary to rotate the adjusting knob 13 to adjust the distance between the first pad 8 and the second pad 10.

[0049] In summary, the torque wrench suitable for the instrument valve provided by the embodiment of the present application has the following advantages:

[0050] 1. The torque value can be adjusted to control the switching force, solve the problem that the maintenance personnel cannot accurately master the switching force and can only operate according to the feeling, effectively reduce the probability of damage to the valve core, prolong the service life of the valve core, and reduce unnecessary work, safety hazards and unnecessary economic losses.

[0051] 2. The self-locking device is designed, the connection between the torque wrench and the instrument valve can be realized, the problem of falling of the torque wrench during operation can be prevented, the risk of falling and becoming a foreign matter is prevented, and the work progress of the unit in the debugging, daily operation and overhaul working conditions is ensured.

[0052] The above describes the embodiments of the present application by specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the description. Although the description of the present application is introduced in combination with some examples, this does not mean that the features of the present application are limited to this embodiment. On the contrary, the purpose of introducing the present application in combination with the embodiment is to cover other options or modifications that can be extended based on the claims of the present application. In order to provide a deep understanding of the present application, many specific details are included in the above description. The present application can also be implemented without using these details. In addition, in order to avoid confusion or obscure the focus of the present application, some specific details are omitted in the description. It should be noted that the examples and features in the examples in the present application can be combined with each other without conflict.

[0053] It should be noted that in the description of the application, similar reference numerals and letters in different drawings represent similar items, therefore, once an item is defined in one drawing, it is not necessary to further define and explain it in the subsequent drawings. In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0054] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A torque wrench suitable for instrument valves, characterized in that: include: A rod body (1), wherein one axial side of the rod body (1) is hollow, and a relief hole vertically connected to the hollow cavity (5) is provided in the middle of the rod body (1); A transmission rod (2), the transmission rod (2) comprising a first section and a second section, the first section being located in the hollow cavity (5) and being rotatably connected to the cavity wall of the hollow cavity (5) via a latch (4), a gap being defined between an end of the first section away from the latch (4) and the cavity wall of the hollow cavity (5), one end of the second section passing through the avoidance hole and connected to the first section, and a slot (14) being configured on the end surface of the other end of the second section; a supporting assembly, the supporting assembly being arranged on the first section and connected to an end portion of the first section to provide axial pressure to the first section; A self-locking sleeve (3) is sleeved on the second section, a fastening member (6) is provided on the self-locking sleeve (3), and an internal thread is configured on a port of the self-locking sleeve (3) away from the second section.

2. The torque wrench suitable for instrument valve according to claim 1, characterized in that: The fastening member (6) is configured as a set screw.

3. The torque wrench suitable for instrument valve according to claim 2, characterized in that: The number of the fastening members (6) is configured to be plural.

4. The torque wrench suitable for instrument valve according to claim 3, characterized in that: The set screws are evenly distributed along the length of the second section.

5. The torque wrench suitable for instrument valve according to claim 2, characterized in that: A limiting ring groove (7) is coaxially provided on the outer wall of the second section, wherein the end of the fastening member (6) is located in the limiting ring groove (7).

6. The torque wrench suitable for instrument valve according to claim 1, characterized in that: A through hole is provided in the radial direction on the first section, and the latch (4) is located in the through hole.

7. The torque wrench suitable for instrument valve according to claim 1, characterized in that: The holding assembly contacts the end of the first section via a pivot block (11).

8. The torque wrench suitable for instrument valves according to claim 7, characterized in that: A groove suitable for accommodating the pivot block (11) is formed on the end surface of the first section.

9. The torque wrench suitable for instrument valves according to claim 1, characterized in that: The holding assembly comprises: a first cushion block (8), the first cushion block (8) being movably disposed in the hollow cavity (5) of the first section; a force storage spring (9), one end of the force storage spring (9) being connected to the first cushion block (8); A second pad (10), the second pad (10) is movably arranged in the hollow cavity (5) of the first section, the second pad (10) is connected to the other end of the force storage spring (9), and the second pad (10) is used to contact the end of the first section.

10. The torque wrench suitable for instrument valves according to claim 9, characterized in that: A scale rod (12) having one end penetrating the rod body (1) is rotatably provided on the first cushion block (8), and an adjustment knob (13) is connected to the end of the scale rod (12), wherein the scale rod (12) is threadedly connected to the rod body (1).

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